72225252 has 36 divisors (see below), whose sum is σ = 199167696. Its totient is φ = 21886320.

The previous prime is 72225239. The next prime is 72225277. The reversal of 72225252 is 25252227.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90798 + ... + 91589.

It is an arithmetic number, because the mean of its divisors is an integer number (5532436).

Almost surely, 2^72225252 is an apocalyptic number.

It is an amenable number.

72225252 is an abundant number, since it is smaller than the sum of its proper divisors (126942444).

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

72225252 is a wasteful number, since it uses less digits than its factorization.

72225252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182408 (or 182403 counting only the distinct ones).

The product of its digits is 5600, while the sum is 27.

The square root of 72225252 is about 8498.5441106109. The cubic root of 72225252 is about 416.4501491256.

Adding to 72225252 its reverse (25252227), we get a palindrome (97477479).

The spelling of 72225252 in words is "seventy-two million, two hundred twenty-five thousand, two hundred fifty-two".