51431213279 has 32 divisors (see below), whose sum is σ = 55419033600. Its totient is φ = 47561310720.

The previous prime is 51431213257. The next prime is 51431213329. The reversal of 51431213279 is 97231213415.

It is not a de Polignac number, because 51431213279 - 2⁸ = 51431213023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51431213209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155381144 + ... + 155381474.

It is an arithmetic number, because the mean of its divisors is an integer number (1731844800).

Almost surely, 2^51431213279 is an apocalyptic number.

51431213279 is a deficient number, since it is larger than the sum of its proper divisors (3987820321).

51431213279 is a wasteful number, since it uses less digits than its factorization.

51431213279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983.

The product of its digits is 45360, while the sum is 38.

The spelling of 51431213279 in words is "fifty-one billion, four hundred thirty-one million, two hundred thirteen thousand, two hundred seventy-nine".