51324725 has 6 divisors (see below), whose sum is σ = 63642690. Its totient is φ = 41059760.

The previous prime is 51324709. The next prime is 51324739. The reversal of 51324725 is 52742315.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3452164 + 47872561 = 1858^2 + 6919^2 .

It is not a de Polignac number, because 51324725 - 2⁴ = 51324709 is a prime.

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, 1026470 + ... + 1026519.

It is an arithmetic number, because the mean of its divisors is an integer number (10607115).

Almost surely, 2^51324725 is an apocalyptic number.

It is an amenable number.

51324725 is a deficient number, since it is larger than the sum of its proper divisors (12317965).

51324725 is a wasteful number, since it uses less digits than its factorization.

51324725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052999 (or 2052994 counting only the distinct ones).

The product of its digits is 8400, while the sum is 29.

The square root of 51324725 is about 7164.1276510124. The cubic root of 51324725 is about 371.6283841426.

The spelling of 51324725 in words is "fifty-one million, three hundred twenty-four thousand, seven hundred twenty-five".