51624923 has 4 divisors (see below), whose sum is σ = 58999920. Its totient is φ = 44249928.

The previous prime is 51624913. The next prime is 51624929. The reversal of 51624923 is 32942615.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51624923 - 2⁸ = 51624667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51624923.

It is not an unprimeable number, because it can be changed into a prime (51624929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3687488 + ... + 3687501.

It is an arithmetic number, because the mean of its divisors is an integer number (14749980).

Almost surely, 2^51624923 is an apocalyptic number.

51624923 is a deficient number, since it is larger than the sum of its proper divisors (7374997).

51624923 is an equidigital number, since it uses as much as digits as its factorization.

51624923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7374996.

The product of its digits is 12960, while the sum is 32.

The square root of 51624923 is about 7185.0485732527. The cubic root of 51624923 is about 372.3515267931.

The spelling of 51624923 in words is "fifty-one million, six hundred twenty-four thousand, nine hundred twenty-three".