51972570 has 192 divisors, whose sum is σ = 161274240. Its totient is φ = 11860992.

The previous prime is 51972563. The next prime is 51972589. The reversal of 51972570 is 7527915.

51972570 is a `hidden beast` number, since 5 + 19 + 72 + 570 = 666.

It is a super-2 number, since 2×51972570² = 5402296064809800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 775677 + ... + 775743.

It is an arithmetic number, because the mean of its divisors is an integer number (839970).

Almost surely, 2^51972570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51972570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80637120).

51972570 is an abundant number, since it is smaller than the sum of its proper divisors (109301670).

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

51972570 is a wasteful number, since it uses less digits than its factorization.

51972570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 51972570 is about 7209.2003717472. The cubic root of 51972570 is about 373.1854741506.

The spelling of 51972570 in words is "fifty-one million, nine hundred seventy-two thousand, five hundred seventy".