51103553200 has 120 divisors (see below), whose sum is σ = 142410543872. Its totient is φ = 17259644160.

The previous prime is 51103553173. The next prime is 51103553201. The reversal of 51103553200 is 235530115.

It is a super-2 number, since 2×51103553200² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (51103553201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51397 + ... + 323803.

Almost surely, 2^51103553200 is an apocalyptic number.

51103553200 is a gapful number since it is divisible by the number (50) 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 51103553200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71205271936).

51103553200 is an abundant number, since it is smaller than the sum of its proper divisors (91306990672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51103553200 is a wasteful number, since it uses less digits than its factorization.

51103553200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272499 (or 272488 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The spelling of 51103553200 in words is "fifty-one billion, one hundred three million, five hundred fifty-three thousand, two hundred".