51572872 has 16 divisors (see below), whose sum is σ = 104137740. Its totient is φ = 23802816.

The previous prime is 51572839. The next prime is 51572879. The reversal of 51572872 is 27827515.

It can be written as a sum of positive squares in 2 ways, for example, as 49364676 + 2208196 = 7026^2 + 1486^2 .

It is a super-2 number, since 2×51572872² = 5319522252656768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51572879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247843 + ... + 248050.

Almost surely, 2^51572872 is an apocalyptic number.

51572872 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51572872 is an abundant number, since it is smaller than the sum of its proper divisors (52564868).

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

51572872 is a wasteful number, since it uses less digits than its factorization.

51572872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495912 (or 495908 counting only the distinct ones).

The product of its digits is 39200, while the sum is 37.

The square root of 51572872 is about 7181.4254852362. The cubic root of 51572872 is about 372.2263431571.

The spelling of 51572872 in words is "fifty-one million, five hundred seventy-two thousand, eight hundred seventy-two".