51507964 has 12 divisors (see below), whose sum is σ = 90247864. Its totient is φ = 25722864.

The previous prime is 51507947. The next prime is 51508001. The reversal of 51507964 is 46970515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3834 + ... + 10849.

Almost surely, 2^51507964 is an apocalyptic number.

It is an amenable number.

51507964 is a deficient number, since it is larger than the sum of its proper divisors (38739900).

51507964 is a wasteful number, since it uses less digits than its factorization.

51507964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15564 (or 15562 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 51507964 is about 7176.9049039262. The cubic root of 51507964 is about 372.0701201306.

The spelling of 51507964 in words is "fifty-one million, five hundred seven thousand, nine hundred sixty-four".