51642925 has 6 divisors (see below), whose sum is σ = 64037258. Its totient is φ = 41314320.

The previous prime is 51642917. The next prime is 51642937. The reversal of 51642925 is 52924615.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 14115049 + 37527876 = 3757^2 + 6126^2 .

It is not a de Polignac number, because 51642925 - 2³ = 51642917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1032834 + ... + 1032883.

Almost surely, 2^51642925 is an apocalyptic number.

It is an amenable number.

51642925 is a deficient number, since it is larger than the sum of its proper divisors (12394333).

51642925 is a wasteful number, since it uses less digits than its factorization.

51642925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065727 (or 2065722 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 51642925 is about 7186.3012043749. The cubic root of 51642925 is about 372.3948023586.

The spelling of 51642925 in words is "fifty-one million, six hundred forty-two thousand, nine hundred twenty-five".