51566425 has 6 divisors (see below), whose sum is σ = 63942398. Its totient is φ = 41253120.

The previous prime is 51566407. The next prime is 51566441. The reversal of 51566425 is 52466515.

It can be written as a sum of positive squares in 3 ways, for example, as 8637721 + 42928704 = 2939^2 + 6552^2 .

It is not a de Polignac number, because 51566425 - 2¹³ = 51558233 is a prime.

It is a Duffinian 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, 1031304 + ... + 1031353.

Almost surely, 2^51566425 is an apocalyptic number.

It is an amenable number.

51566425 is a deficient number, since it is larger than the sum of its proper divisors (12375973).

51566425 is a wasteful number, since it uses less digits than its factorization.

51566425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062667 (or 2062662 counting only the distinct ones).

The product of its digits is 36000, while the sum is 34.

The square root of 51566425 is about 7180.9766048916. The cubic root of 51566425 is about 372.2108321391.

The spelling of 51566425 in words is "fifty-one million, five hundred sixty-six thousand, four hundred twenty-five".