51431230424 has 32 divisors (see below), whose sum is σ = 110607682080. Its totient is φ = 21962375424.

The previous prime is 51431230391. The next prime is 51431230441. The reversal of 51431230424 is 42403213415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1642277 + ... + 1673300.

It is an arithmetic number, because the mean of its divisors is an integer number (3456490065).

Almost surely, 2^51431230424 is an apocalyptic number.

It is an amenable number.

51431230424 is an abundant number, since it is smaller than the sum of its proper divisors (59176451656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51431230424 is a wasteful number, since it uses less digits than its factorization.

51431230424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3315867 (or 3315863 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 51431230424 its reverse (42403213415), we get a palindrome (93834443839).

The spelling of 51431230424 in words is "fifty-one billion, four hundred thirty-one million, two hundred thirty thousand, four hundred twenty-four".