51656925 has 48 divisors (see below), whose sum is σ = 88869312. Its totient is φ = 26457600.

The previous prime is 51656909. The next prime is 51656947. The reversal of 51656925 is 52965615.

51656925 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 51656925 - 2⁴ = 51656909 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 328947 + ... + 329103.

It is an arithmetic number, because the mean of its divisors is an integer number (1851444).

Almost surely, 2^51656925 is an apocalyptic number.

It is an amenable number.

51656925 is a deficient number, since it is larger than the sum of its proper divisors (37212387).

51656925 is a wasteful number, since it uses less digits than its factorization.

51656925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 313 counting only the distinct ones).

The product of its digits is 81000, while the sum is 39.

The square root of 51656925 is about 7187.2752138763. The cubic root of 51656925 is about 372.4284504410.

It can be divided in two parts, 5165 and 6925, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 51656925 in words is "fifty-one million, six hundred fifty-six thousand, nine hundred twenty-five".