72511229 has 8 divisors (see below), whose sum is σ = 84561600. Its totient is φ = 62152188.

The previous prime is 72511213. The next prime is 72511253. The reversal of 72511229 is 92211527.

It is not a de Polignac number, because 72511229 - 2⁴ = 72511213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72511259) 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, 105359 + ... + 106044.

It is an arithmetic number, because the mean of its divisors is an integer number (10570200).

Almost surely, 2^72511229 is an apocalyptic number.

It is an amenable number.

72511229 is a deficient number, since it is larger than the sum of its proper divisors (12050371).

72511229 is an equidigital number, since it uses as much as digits as its factorization.

72511229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211424 (or 211410 counting only the distinct ones).

The product of its digits is 2520, while the sum is 29.

The square root of 72511229 is about 8515.3525470177. The cubic root of 72511229 is about 416.9990722030. Note that the first 3 decimals are identical.

The spelling of 72511229 in words is "seventy-two million, five hundred eleven thousand, two hundred twenty-nine".