72551512 has 32 divisors (see below), whose sum is σ = 157133520. Its totient is φ = 31037440.

The previous prime is 72551491. The next prime is 72551513. The reversal of 72551512 is 21515527.

It is a super-2 number, since 2×72551512² = 10527443786972288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72551513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22753 + ... + 25744.

Almost surely, 2^72551512 is an apocalyptic number.

It is an amenable number.

72551512 is an abundant number, since it is smaller than the sum of its proper divisors (84582008).

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

72551512 is a wasteful number, since it uses less digits than its factorization.

72551512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48531 (or 48527 counting only the distinct ones).

The product of its digits is 3500, while the sum is 28.

The square root of 72551512 is about 8517.7175346451. The cubic root of 72551512 is about 417.0762780103.

It can be divided in two parts, 725515 and 12, that added together give a palindrome (725527).

The spelling of 72551512 in words is "seventy-two million, five hundred fifty-one thousand, five hundred twelve".