51924972 has 48 divisors (see below), whose sum is σ = 133305984. Its totient is φ = 15730000.

The previous prime is 51924947. The next prime is 51924991. The reversal of 51924972 is 27942915.

It is a self number, because there is not a number n which added to its sum of digits gives 51924972.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14347 + ... + 17597.

It is an arithmetic number, because the mean of its divisors is an integer number (2777208).

Almost surely, 2^51924972 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 51924972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66652992).

51924972 is an abundant number, since it is smaller than the sum of its proper divisors (81381012).

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

51924972 is a wasteful number, since it uses less digits than its factorization.

51924972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291 (or 3267 counting only the distinct ones).

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

The square root of 51924972 is about 7205.8984172690. The cubic root of 51924972 is about 373.0715146296.

The spelling of 51924972 in words is "fifty-one million, nine hundred twenty-four thousand, nine hundred seventy-two".