51756725 has 12 divisors (see below), whose sum is σ = 64954176. Its totient is φ = 40904880.

The previous prime is 51756713. The next prime is 51756751. The reversal of 51756725 is 52765715.

It is not a de Polignac number, because 51756725 - 2⁴ = 51756709 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 10397 + ... + 14546.

It is an arithmetic number, because the mean of its divisors is an integer number (5412848).

Almost surely, 2^51756725 is an apocalyptic number.

It is an amenable number.

51756725 is a deficient number, since it is larger than the sum of its proper divisors (13197451).

51756725 is a wasteful number, since it uses less digits than its factorization.

51756725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25036 (or 25031 counting only the distinct ones).

The product of its digits is 73500, while the sum is 38.

The square root of 51756725 is about 7194.2146895961. The cubic root of 51756725 is about 372.6681372392.

The spelling of 51756725 in words is "fifty-one million, seven hundred fifty-six thousand, seven hundred twenty-five".