51121168 has 20 divisors (see below), whose sum is σ = 113197120. Its totient is φ = 21909024.

The previous prime is 51121163. The next prime is 51121237. The reversal of 51121168 is 86112115.

It is a happy number.

It is a super-2 number, since 2×51121168² = 5226747635368448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51121163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228108 + ... + 228331.

It is an arithmetic number, because the mean of its divisors is an integer number (5659856).

Almost surely, 2^51121168 is an apocalyptic number.

It is an amenable number.

51121168 is an abundant number, since it is smaller than the sum of its proper divisors (62075952).

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

51121168 is a wasteful number, since it uses less digits than its factorization.

51121168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456454 (or 456448 counting only the distinct ones).

The product of its digits is 480, while the sum is 25.

The square root of 51121168 is about 7149.9068525401. The cubic root of 51121168 is about 371.1364328946.

The spelling of 51121168 in words is "fifty-one million, one hundred twenty-one thousand, one hundred sixty-eight".