72556225 has 12 divisors (see below), whose sum is σ = 102822784. Its totient is φ = 49752720.

The previous prime is 72556219. The next prime is 72556229. The reversal of 72556225 is 52265527.

It is not a de Polignac number, because 72556225 - 2¹⁵ = 72523457 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72556229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207129 + ... + 207478.

Almost surely, 2^72556225 is an apocalyptic number.

It is an amenable number.

72556225 is a deficient number, since it is larger than the sum of its proper divisors (30266559).

72556225 is a wasteful number, since it uses less digits than its factorization.

72556225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414624 (or 414619 counting only the distinct ones).

The product of its digits is 42000, while the sum is 34.

The square root of 72556225 is about 8517.9941887747. The cubic root of 72556225 is about 417.0853090095.

The spelling of 72556225 in words is "seventy-two million, five hundred fifty-six thousand, two hundred twenty-five".