51121521160 has 32 divisors (see below), whose sum is σ = 115061520600. Its totient is φ = 20441835520.

The previous prime is 51121521119. The next prime is 51121521167. The reversal of 51121521160 is 6112512115.

It can be written as a sum of positive squares in 4 ways, for example, as 50865585156 + 255936004 = 225534^2 + 15998^2 .

It is a super-2 number, since 2×51121521160² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51121521167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88495 + ... + 331774.

Almost surely, 2^51121521160 is an apocalyptic number.

It is an amenable number.

51121521160 is an abundant number, since it is smaller than the sum of its proper divisors (63939999440).

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

51121521160 is a wasteful number, since it uses less digits than its factorization.

51121521160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423321 (or 423317 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 25.

The spelling of 51121521160 in words is "fifty-one billion, one hundred twenty-one million, five hundred twenty-one thousand, one hundred sixty".