51261325 has 12 divisors (see below), whose sum is σ = 63780640. Its totient is φ = 40869360.

The previous prime is 51261313. The next prime is 51261359. The reversal of 51261325 is 52316215.

It is not a de Polignac number, because 51261325 - 2⁵ = 51261293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 51261325.

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, 4336 + ... + 11014.

Almost surely, 2^51261325 is an apocalyptic number.

It is an amenable number.

51261325 is a deficient number, since it is larger than the sum of its proper divisors (12519315).

51261325 is a wasteful number, since it uses less digits than its factorization.

51261325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6996 (or 6991 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 51261325 is about 7159.7014602566. The cubic root of 51261325 is about 371.4753003691.

The spelling of 51261325 in words is "fifty-one million, two hundred sixty-one thousand, three hundred twenty-five".