51022111168 has 84 divisors (see below), whose sum is σ = 122121820272. Its totient is φ = 20715678720.

The previous prime is 51022111163. The next prime is 51022111193. The reversal of 51022111168 is 86111122015.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51022111163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3988 + ... + 319468.

Almost surely, 2^51022111168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51022111168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61060910136).

51022111168 is an abundant number, since it is smaller than the sum of its proper divisors (71099709104).

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

51022111168 is a wasteful number, since it uses less digits than its factorization.

51022111168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315538 (or 315509 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 28.

The spelling of 51022111168 in words is "fifty-one billion, twenty-two million, one hundred eleven thousand, one hundred sixty-eight".