| Base | Representation |
|---|---|
| bin | 1100001011111… |
| … | …0000101001100 |
| 3 | 10120011200001010 |
| 4 | 3002332011030 |
| 5 | 101041011340 |
| 6 | 5023245220 |
| 7 | 1160300250 |
| oct | 302760514 |
| 9 | 116150033 |
| 10 | 51110220 |
| 11 | 26939957 |
| 12 | 15149810 |
| 13 | a786845 |
| 14 | 6b06260 |
| 15 | 4748b80 |
| hex | 30be14c |
51110220 has 96 divisors (see below), whose sum is σ = 165892608. Its totient is φ = 11515392.
The previous prime is 51110219. The next prime is 51110221. The reversal of 51110220 is 2201115.
It is an interprime number because it is at equal distance from previous prime (51110219) and next prime (51110221).
It is a super-2 number, since 2×511102202 = 5224509176896800, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (12).
It is a junction number, because it is equal to n+sod(n) for n = 51110196 and 51110205.
It is not an unprimeable number, because it can be changed into a prime (51110221) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29827 + ... + 31493.
It is an arithmetic number, because the mean of its divisors is an integer number (1728048).
Almost surely, 251110220 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 51110220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82946304).
51110220 is an abundant number, since it is smaller than the sum of its proper divisors (114782388).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
51110220 is a wasteful number, since it uses less digits than its factorization.
51110220 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1759 (or 1757 counting only the distinct ones).
The product of its (nonzero) digits is 20, while the sum is 12.
The square root of 51110220 is about 7149.1412071661. The cubic root of 51110220 is about 371.1099370749.
Adding to 51110220 its reverse (2201115), we get a palindrome (53311335).
It can be divided in two parts, 511 and 10220, that added together give a triangular number (10731 = T146).
The spelling of 51110220 in words is "fifty-one million, one hundred ten thousand, two hundred twenty".
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