51324657 has 4 divisors (see below), whose sum is σ = 68432880. Its totient is φ = 34216436.

The previous prime is 51324653. The next prime is 51324659. The reversal of 51324657 is 75642315.

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 51324657 - 2² = 51324653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51324653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8554107 + ... + 8554112.

It is an arithmetic number, because the mean of its divisors is an integer number (17108220).

Almost surely, 2^51324657 is an apocalyptic number.

It is an amenable number.

51324657 is a deficient number, since it is larger than the sum of its proper divisors (17108223).

51324657 is a wasteful number, since it uses less digits than its factorization.

51324657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17108222.

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

The square root of 51324657 is about 7164.1229051434. The cubic root of 51324657 is about 371.6282200193.

The spelling of 51324657 in words is "fifty-one million, three hundred twenty-four thousand, six hundred fifty-seven".