72225136 has 10 divisors (see below), whose sum is σ = 139936232. Its totient is φ = 36112560.

The previous prime is 72225113. The next prime is 72225143. The reversal of 72225136 is 63152227.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2257020 + ... + 2257051.

Almost surely, 2^72225136 is an apocalyptic number.

It is an amenable number.

72225136 is a deficient number, since it is larger than the sum of its proper divisors (67711096).

72225136 is a wasteful number, since it uses less digits than its factorization.

72225136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514079 (or 4514073 counting only the distinct ones).

The product of its digits is 5040, while the sum is 28.

The square root of 72225136 is about 8498.5372859099. The cubic root of 72225136 is about 416.4499261739.

It can be divided in two parts, 72225 and 136, that added together give a square (72361 = 269²).

The spelling of 72225136 in words is "seventy-two million, two hundred twenty-five thousand, one hundred thirty-six".