51530211723862 has 32 divisors (see below), whose sum is σ = 82695784647168. Its totient is φ = 24023890214016.

The previous prime is 51530211723829. The next prime is 51530211723869. The reversal of 51530211723862 is 26832711203515.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51530211723869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24901363 + ... + 26891230.

It is an arithmetic number, because the mean of its divisors is an integer number (2584243270224).

Almost surely, 2^{51530211723862} is an apocalyptic number.

51530211723862 is a deficient number, since it is larger than the sum of its proper divisors (31165572923306).

51530211723862 is a wasteful number, since it uses less digits than its factorization.

51530211723862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51793164.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 51530211723862 in words is "fifty-one trillion, five hundred thirty billion, two hundred eleven million, seven hundred twenty-three thousand, eight hundred sixty-two".