51245560235232 has 240 divisors, whose sum is σ = 164420705200752. Its totient is φ = 15528214702080.

The previous prime is 51245560235231. The next prime is 51245560235297. The reversal of 51245560235232 is 23253206554215.

51245560235232 is a `hidden beast` number, since 5 + 1 + 2 + 4 + 5 + 5 + 602 + 3 + 5 + 2 + 32 = 666.

It is a super-2 number, since 2×51245560235232² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51245560235231) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1021759468 + ... + 1021809620.

Almost surely, 2^{51245560235232} 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 51245560235232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82210352600376).

51245560235232 is an abundant number, since it is smaller than the sum of its proper divisors (113175144965520).

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

51245560235232 is a wasteful number, since it uses less digits than its factorization.

51245560235232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86023 (or 86006 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 45.

Adding to 51245560235232 its reverse (23253206554215), we get a palindrome (74498766789447).

The spelling of 51245560235232 in words is "fifty-one trillion, two hundred forty-five billion, five hundred sixty million, two hundred thirty-five thousand, two hundred thirty-two".