51112139700 has 72 divisors (see below), whose sum is σ = 152654951680. Its totient is φ = 13190227200.

The previous prime is 51112139699. The next prime is 51112139747. The reversal of 51112139700 is 793121115.

It is a super-2 number, since 2×51112139700² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2738665 + ... + 2757264.

Almost surely, 2^51112139700 is an apocalyptic number.

51112139700 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51112139700 is an abundant number, since it is smaller than the sum of its proper divisors (101542811980).

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

51112139700 is a wasteful number, since it uses less digits than its factorization.

51112139700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5495977 (or 5495970 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 30.

The spelling of 51112139700 in words is "fifty-one billion, one hundred twelve million, one hundred thirty-nine thousand, seven hundred".