51515101135521 has 32 divisors (see below), whose sum is σ = 76502656128000. Its totient is φ = 34260652508544.

The previous prime is 51515101135469. The next prime is 51515101135559. The reversal of 51515101135521 is 12553110151515.

51515101135521 is a `hidden beast` number, since 5 + 1 + 5 + 1 + 5 + 10 + 113 + 5 + 521 = 666.

51515101135521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51515101135521 - 2⁹ = 51515101135009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51515101131521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39568101 + ... + 40849293.

It is an arithmetic number, because the mean of its divisors is an integer number (2390708004000).

Almost surely, 2^{51515101135521} is an apocalyptic number.

It is an amenable number.

51515101135521 is a deficient number, since it is larger than the sum of its proper divisors (24987554992479).

51515101135521 is a wasteful number, since it uses less digits than its factorization.

51515101135521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284790 (or 1284784 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 36.

The spelling of 51515101135521 in words is "fifty-one trillion, five hundred fifteen billion, one hundred one million, one hundred thirty-five thousand, five hundred twenty-one".