72172250 has 16 divisors (see below), whose sum is σ = 135106920. Its totient is φ = 28868800.

The previous prime is 72172207. The next prime is 72172297. The reversal of 72172250 is 5227127.

It can be written as a sum of positive squares in 4 ways, for example, as 25290841 + 46881409 = 5029^2 + 6847^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144095 + ... + 144594.

Almost surely, 2^72172250 is an apocalyptic number.

72172250 is a deficient number, since it is larger than the sum of its proper divisors (62934670).

72172250 is a wasteful number, since it uses less digits than its factorization.

72172250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288706 (or 288696 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 72172250 is about 8495.4252395039. The cubic root of 72172250 is about 416.3482545126.

Adding to 72172250 its reverse (5227127), we get a palindrome (77399377).

The spelling of 72172250 in words is "seventy-two million, one hundred seventy-two thousand, two hundred fifty".