51515023155 has 32 divisors (see below), whose sum is σ = 82627776000. Its totient is φ = 27406854912.

The previous prime is 51515023129. The next prime is 51515023169. The reversal of 51515023155 is 55132051515.

It is not a de Polignac number, because 51515023155 - 2⁵ = 51515023123 is a prime.

It is a super-2 number, since 2×51515023155² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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, 15613696 + ... + 15616994.

It is an arithmetic number, because the mean of its divisors is an integer number (2582118000).

Almost surely, 2^51515023155 is an apocalyptic number.

51515023155 is a deficient number, since it is larger than the sum of its proper divisors (31112752845).

51515023155 is a wasteful number, since it uses less digits than its factorization.

51515023155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5563.

The product of its (nonzero) digits is 18750, while the sum is 33.

The spelling of 51515023155 in words is "fifty-one billion, five hundred fifteen million, twenty-three thousand, one hundred fifty-five".