51615525 has 48 divisors (see below), whose sum is σ = 92744064. Its totient is φ = 25178880.

The previous prime is 51615511. The next prime is 51615547. The reversal of 51615525 is 52551615.

51615525 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 51615525 - 2⁵ = 51615493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51615492 and 51615501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 162667 + ... + 162983.

It is an arithmetic number, because the mean of its divisors is an integer number (1932168).

Almost surely, 2^51615525 is an apocalyptic number.

It is an amenable number.

51615525 is a deficient number, since it is larger than the sum of its proper divisors (41128539).

51615525 is a wasteful number, since it uses less digits than its factorization.

51615525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 505 counting only the distinct ones).

The product of its digits is 7500, while the sum is 30.

The square root of 51615525 is about 7184.3945465154. The cubic root of 51615525 is about 372.3289306528.

The spelling of 51615525 in words is "fifty-one million, six hundred fifteen thousand, five hundred twenty-five".