51808957223 has 8 divisors (see below), whose sum is σ = 56194508160. Its totient is φ = 47572069120.

The previous prime is 51808957201. The next prime is 51808957261. The reversal of 51808957223 is 32275980815.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51808957223 - 2⁸ = 51808956967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51808957283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37164983 + ... + 37166376.

It is an arithmetic number, because the mean of its divisors is an integer number (7024313520).

Almost surely, 2^51808957223 is an apocalyptic number.

51808957223 is a deficient number, since it is larger than the sum of its proper divisors (4385550937).

51808957223 is a wasteful number, since it uses less digits than its factorization.

51808957223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74331417.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 51808957223 in words is "fifty-one billion, eight hundred eight million, nine hundred fifty-seven thousand, two hundred twenty-three".