51425637 has 4 divisors (see below), whose sum is σ = 68567520. Its totient is φ = 34283756.

The previous prime is 51425611. The next prime is 51425641. The reversal of 51425637 is 73652415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51425637 - 2¹⁰ = 51424613 is a prime.

It is a super-2 number, since 2×51425637² = 5289192281711538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51425598 and 51425607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51425657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8570937 + ... + 8570942.

It is an arithmetic number, because the mean of its divisors is an integer number (17141880).

Almost surely, 2^51425637 is an apocalyptic number.

It is an amenable number.

51425637 is a deficient number, since it is larger than the sum of its proper divisors (17141883).

51425637 is a wasteful number, since it uses less digits than its factorization.

51425637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17141882.

The product of its digits is 25200, while the sum is 33.

The square root of 51425637 is about 7171.1670598306. The cubic root of 51425637 is about 371.8717834809.

The spelling of 51425637 in words is "fifty-one million, four hundred twenty-five thousand, six hundred thirty-seven".