72257325 has 24 divisors (see below), whose sum is σ = 136532928. Its totient is φ = 33031680.

The previous prime is 72257303. The next prime is 72257333. The reversal of 72257325 is 52375227.

It is not a de Polignac number, because 72257325 - 2⁸ = 72257069 is a prime.

It is a super-2 number, since 2×72257325² = 10442242032311250, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68292 + ... + 69341.

It is an arithmetic number, because the mean of its divisors is an integer number (5688872).

Almost surely, 2^72257325 is an apocalyptic number.

72257325 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

72257325 is a deficient number, since it is larger than the sum of its proper divisors (64275603).

72257325 is a wasteful number, since it uses less digits than its factorization.

72257325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137653 (or 137648 counting only the distinct ones).

The product of its digits is 29400, while the sum is 33.

The square root of 72257325 is about 8500.4308714323. The cubic root of 72257325 is about 416.5117842123.

The spelling of 72257325 in words is "seventy-two million, two hundred fifty-seven thousand, three hundred twenty-five".