51213833942 has 16 divisors (see below), whose sum is σ = 78863370432. Its totient is φ = 24929924040.

The previous prime is 51213833911. The next prime is 51213833971. The reversal of 51213833942 is 24933831215.

It is a super-3 number, since 3×51213833942³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51213833942.

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, 943484 + ... + 996287.

It is an arithmetic number, because the mean of its divisors is an integer number (4928960652).

Almost surely, 2^51213833942 is an apocalyptic number.

51213833942 is a deficient number, since it is larger than the sum of its proper divisors (27649536490).

51213833942 is a wasteful number, since it uses less digits than its factorization.

51213833942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940123.

The product of its digits is 155520, while the sum is 41.

The spelling of 51213833942 in words is "fifty-one billion, two hundred thirteen million, eight hundred thirty-three thousand, nine hundred forty-two".