51502525 has 6 divisors (see below), whose sum is σ = 63863162. Its totient is φ = 41202000.

The previous prime is 51502513. The next prime is 51502541. The reversal of 51502525 is 52520515.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6061444 + 45441081 = 2462^2 + 6741^2 .

It is not a de Polignac number, because 51502525 - 2⁷ = 51502397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 2060101 = 51502525 / (5 + 1 + 5 + 0 + 2 + 5 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51502525.

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, 1030026 + ... + 1030075.

Almost surely, 2^51502525 is an apocalyptic number.

It is an amenable number.

51502525 is a deficient number, since it is larger than the sum of its proper divisors (12360637).

51502525 is a wasteful number, since it uses less digits than its factorization.

51502525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060111 (or 2060106 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 51502525 is about 7176.5259701335. The cubic root of 51502525 is about 372.0570233817.

The spelling of 51502525 in words is "fifty-one million, five hundred two thousand, five hundred twenty-five".