51100251156 has 72 divisors (see below), whose sum is σ = 130484960424. Its totient is φ = 16860426240.

The previous prime is 51100251133. The next prime is 51100251247. The reversal of 51100251156 is 65115200115.

It can be written as a sum of positive squares in 4 ways, for example, as 825642756 + 50274608400 = 28734^2 + 224220^2 .

It is a super-2 number, since 2×51100251156² (a number of 22 digits) contains 22 as substring.

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, 3234316 + ... + 3250076.

It is an arithmetic number, because the mean of its divisors is an integer number (1812291117).

Almost surely, 2^51100251156 is an apocalyptic number.

It is an amenable number.

51100251156 is an abundant number, since it is smaller than the sum of its proper divisors (79384709268).

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

51100251156 is a wasteful number, since it uses less digits than its factorization.

51100251156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16681 (or 16676 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The spelling of 51100251156 in words is "fifty-one billion, one hundred million, two hundred fifty-one thousand, one hundred fifty-six".