Base | Representation |
---|---|
bin | 1110100111100… |
… | …1100000001000 |
3 | 11021101010110220 |
4 | 3221321200020 |
5 | 111144040310 |
6 | 10030110040 |
7 | 1343112111 |
oct | 351714010 |
9 | 137333426 |
10 | 61315080 |
11 | 31679a22 |
12 | 1864b320 |
13 | c91a718 |
14 | 8201208 |
15 | 55b2670 |
hex | 3a79808 |
61315080 has 64 divisors (see below), whose sum is σ = 185803200. Its totient is φ = 16185600.
The previous prime is 61315069. The next prime is 61315081. The reversal of 61315080 is 8051316.
It is a Harshad number since it is a multiple of its sum of digits (24).
It is a self number, because there is not a number n which added to its sum of digits gives 61315080.
It is not an unprimeable number, because it can be changed into a prime (61315081) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9591 + ... + 14649.
It is an arithmetic number, because the mean of its divisors is an integer number (2903175).
Almost surely, 261315080 is an apocalyptic number.
61315080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 61315080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92901600).
61315080 is an abundant number, since it is smaller than the sum of its proper divisors (124488120).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
61315080 is a wasteful number, since it uses less digits than its factorization.
61315080 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5174 (or 5170 counting only the distinct ones).
The product of its (nonzero) digits is 720, while the sum is 24.
The square root of 61315080 is about 7830.3946260709. The cubic root of 61315080 is about 394.3263205696.
Adding to 61315080 its reverse (8051316), we get a palindrome (69366396).
It can be divided in two parts, 6131 and 5080, that added together give a palindrome (11211).
The spelling of 61315080 in words is "sixty-one million, three hundred fifteen thousand, eighty".
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