51504015 has 16 divisors (see below), whose sum is σ = 85989888. Its totient is φ = 26274336.

The previous prime is 51503987. The next prime is 51504049. The reversal of 51504015 is 51040515.

It is not a de Polignac number, because 51504015 - 2⁵ = 51503983 is a prime.

It is a super-2 number, since 2×51504015² = 5305327122240450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51503982 and 51504000.

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, 74299 + ... + 74988.

It is an arithmetic number, because the mean of its divisors is an integer number (5374368).

Almost surely, 2^51504015 is an apocalyptic number.

51504015 is a deficient number, since it is larger than the sum of its proper divisors (34485873).

51504015 is a wasteful number, since it uses less digits than its factorization.

51504015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149318.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 51504015 is about 7176.6297800569. The cubic root of 51504015 is about 372.0606112939.

The spelling of 51504015 in words is "fifty-one million, five hundred four thousand, fifteen".