51979422 has 24 divisors (see below), whose sum is σ = 114270408. Its totient is φ = 15751120.

The previous prime is 51979409. The next prime is 51979427. The reversal of 51979422 is 22497915.

It is a super-2 number, since 2×51979422² = 5403720622908168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51979427) 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, 35073 + ... + 36524.

It is an arithmetic number, because the mean of its divisors is an integer number (4761267).

Almost surely, 2^51979422 is an apocalyptic number.

51979422 is an abundant number, since it is smaller than the sum of its proper divisors (62290986).

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

51979422 is a wasteful number, since it uses less digits than its factorization.

51979422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71624 (or 71613 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 51979422 is about 7209.6755821604. The cubic root of 51979422 is about 373.2018735352.

The spelling of 51979422 in words is "fifty-one million, nine hundred seventy-nine thousand, four hundred twenty-two".