51125413215320 has 128 divisors (see below), whose sum is σ = 129177894407040. Its totient is φ = 18108569149440.

The previous prime is 51125413215271. The next prime is 51125413215377. The reversal of 51125413215320 is 2351231452115.

It is a super-2 number, since 2×51125413215320² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25840127 + ... + 27748206.

It is an arithmetic number, because the mean of its divisors is an integer number (1009202300055).

Almost surely, 2^{51125413215320} is an apocalyptic number.

It is an amenable number.

51125413215320 is an abundant number, since it is smaller than the sum of its proper divisors (78052481191720).

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

51125413215320 is a wasteful number, since it uses less digits than its factorization.

51125413215320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53588445 (or 53588441 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 51125413215320 its reverse (2351231452115), we get a palindrome (53476644667435).

The spelling of 51125413215320 in words is "fifty-one trillion, one hundred twenty-five billion, four hundred thirteen million, two hundred fifteen thousand, three hundred twenty".