51972168 has 32 divisors (see below), whose sum is σ = 131873760. Its totient is φ = 17064960.

The previous prime is 51972149. The next prime is 51972191. The reversal of 51972168 is 86127915.

It is a super-2 number, since 2×51972168² = 5402212493240448, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14553 + ... + 17768.

It is an arithmetic number, because the mean of its divisors is an integer number (4121055).

Almost surely, 2^51972168 is an apocalyptic number.

It is an amenable number.

51972168 is an abundant number, since it is smaller than the sum of its proper divisors (79901592).

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

51972168 is a wasteful number, since it uses less digits than its factorization.

51972168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32397 (or 32393 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 51972168 is about 7209.1724906538. The cubic root of 51972168 is about 373.1845119703.

The spelling of 51972168 in words is "fifty-one million, nine hundred seventy-two thousand, one hundred sixty-eight".