51515023534 has 32 divisors (see below), whose sum is σ = 88130046816. Its totient is φ = 22372899840.

The previous prime is 51515023523. The next prime is 51515023561. The reversal of 51515023534 is 43532051515.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 51515023534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2895514 + ... + 2913250.

It is an arithmetic number, because the mean of its divisors is an integer number (2754063963).

Almost surely, 2^51515023534 is an apocalyptic number.

51515023534 is a deficient number, since it is larger than the sum of its proper divisors (36615023282).

51515023534 is a wasteful number, since it uses less digits than its factorization.

51515023534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24340.

The product of its (nonzero) digits is 45000, while the sum is 34.

The spelling of 51515023534 in words is "fifty-one billion, five hundred fifteen million, twenty-three thousand, five hundred thirty-four".