51931952424 has 48 divisors (see below), whose sum is σ = 153435316320. Its totient is φ = 15736955040.

The previous prime is 51931952411. The next prime is 51931952431. The reversal of 51931952424 is 42425913915.

It is a happy number.

51931952424 is a `hidden beast` number, since 5 + 1 + 93 + 19 + 524 + 24 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 51931952424.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32784532 + ... + 32786115.

It is an arithmetic number, because the mean of its divisors is an integer number (3196569090).

Almost surely, 2^51931952424 is an apocalyptic number.

It is an amenable number.

51931952424 is an abundant number, since it is smaller than the sum of its proper divisors (101503363896).

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

51931952424 is a wasteful number, since it uses less digits than its factorization.

51931952424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65570670 (or 65570663 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The spelling of 51931952424 in words is "fifty-one billion, nine hundred thirty-one million, nine hundred fifty-two thousand, four hundred twenty-four".