72224570 has 16 divisors (see below), whose sum is σ = 141823008. Its totient is φ = 26263440.

The previous prime is 72224569. The next prime is 72224609. The reversal of 72224570 is 7542227.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328184 + ... + 328403.

It is an arithmetic number, because the mean of its divisors is an integer number (8863938).

Almost surely, 2^72224570 is an apocalyptic number.

72224570 is a deficient number, since it is larger than the sum of its proper divisors (69598438).

72224570 is a wasteful number, since it uses less digits than its factorization.

72224570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656605.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 72224570 is about 8498.5039859966. The cubic root of 72224570 is about 416.4488383196.

Adding to 72224570 its reverse (7542227), we get a palindrome (79766797).

The spelling of 72224570 in words is "seventy-two million, two hundred twenty-four thousand, five hundred seventy".