72251544 has 16 divisors (see below), whose sum is σ = 180628920. Its totient is φ = 24083840.

The previous prime is 72251539. The next prime is 72251551. The reversal of 72251544 is 44515227.

It is a super-2 number, since 2×72251544² = 10440571220767872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1505217 + ... + 1505264.

Almost surely, 2^72251544 is an apocalyptic number.

It is an amenable number.

72251544 is an abundant number, since it is smaller than the sum of its proper divisors (108377376).

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

72251544 is a wasteful number, since it uses less digits than its factorization.

72251544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3010490 (or 3010486 counting only the distinct ones).

The product of its digits is 11200, while the sum is 30.

The square root of 72251544 is about 8500.0908230442. The cubic root of 72251544 is about 416.5006761397.

The spelling of 72251544 in words is "seventy-two million, two hundred fifty-one thousand, five hundred forty-four".