51625305 has 12 divisors (see below), whose sum is σ = 89483940. Its totient is φ = 27533472.

The previous prime is 51625297. The next prime is 51625391. The reversal of 51625305 is 50352615.

51625305 is a `hidden beast` number, since 5 + 1 + 625 + 30 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8696601 + 42928704 = 2949^2 + 6552^2 .

It is not a de Polignac number, because 51625305 - 2³ = 51625297 is a prime.

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, 573570 + ... + 573659.

It is an arithmetic number, because the mean of its divisors is an integer number (7456995).

Almost surely, 2^51625305 is an apocalyptic number.

It is an amenable number.

51625305 is a deficient number, since it is larger than the sum of its proper divisors (37858635).

51625305 is a wasteful number, since it uses less digits than its factorization.

51625305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147240 (or 1147237 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 51625305 is about 7185.0751561831. The cubic root of 51625305 is about 372.3524451992.

The spelling of 51625305 in words is "fifty-one million, six hundred twenty-five thousand, three hundred five".