72503224 has 8 divisors (see below), whose sum is σ = 135943560. Its totient is φ = 36251608.

The previous prime is 72503177. The next prime is 72503231. The reversal of 72503224 is 42230527.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent 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 as a sum of consecutive naturals, namely, 4531444 + ... + 4531459.

It is an arithmetic number, because the mean of its divisors is an integer number (16992945).

Almost surely, 2^72503224 is an apocalyptic number.

It is an amenable number.

72503224 is a deficient number, since it is larger than the sum of its proper divisors (63440336).

72503224 is a wasteful number, since it uses less digits than its factorization.

72503224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9062909 (or 9062905 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 72503224 is about 8514.8825006573. The cubic root of 72503224 is about 416.9837265319.

It can be divided in two parts, 72503 and 224, that added together give a palindrome (72727).

The spelling of 72503224 in words is "seventy-two million, five hundred three thousand, two hundred twenty-four".