51020552142 has 72 divisors (see below), whose sum is σ = 135360693000. Its totient is φ = 13810069728.

The previous prime is 51020552071. The next prime is 51020552179. The reversal of 51020552142 is 24125502015.

51020552142 is a `hidden beast` number, since 5 + 102 + 0 + 552 + 1 + 4 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1505517 + ... + 1539032.

It is an arithmetic number, because the mean of its divisors is an integer number (1880009625).

Almost surely, 2^51020552142 is an apocalyptic number.

51020552142 is an abundant number, since it is smaller than the sum of its proper divisors (84340140858).

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

51020552142 is a wasteful number, since it uses less digits than its factorization.

51020552142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044590 (or 3044580 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 51020552142 in words is "fifty-one billion, twenty million, five hundred fifty-two thousand, one hundred forty-two".