72225320 has 16 divisors (see below), whose sum is σ = 162507060. Its totient is φ = 28890112.

The previous prime is 72225311. The next prime is 72225343. The reversal of 72225320 is 2352227.

It can be written as a sum of positive squares in 2 ways, for example, as 72148036 + 77284 = 8494^2 + 278^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902777 + ... + 902856.

Almost surely, 2^72225320 is an apocalyptic number.

It is an amenable number.

72225320 is an abundant number, since it is smaller than the sum of its proper divisors (90281740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72225320 is a wasteful number, since it uses less digits than its factorization.

72225320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805644 (or 1805640 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 72225320 is about 8498.5481112952. The cubic root of 72225320 is about 416.4502798214.

Adding to 72225320 its reverse (2352227), we get a palindrome (74577547).

The spelling of 72225320 in words is "seventy-two million, two hundred twenty-five thousand, three hundred twenty".