72503331 has 8 divisors (see below), whose sum is σ = 96792144. Its totient is φ = 48275040.

The previous prime is 72503323. The next prime is 72503359. The reversal of 72503331 is 13330527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72503331 - 2³ = 72503323 is a prime.

It is a super-2 number, since 2×72503331² = 10513466012191122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72503371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12256 + ... + 17181.

It is an arithmetic number, because the mean of its divisors is an integer number (12099018).

Almost surely, 2^72503331 is an apocalyptic number.

72503331 is a deficient number, since it is larger than the sum of its proper divisors (24288813).

72503331 is a wasteful number, since it uses less digits than its factorization.

72503331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30261.

The product of its (nonzero) digits is 1890, while the sum is 24.

The square root of 72503331 is about 8514.8887837716. Note that the first 3 decimals coincide. The cubic root of 72503331 is about 416.9839316595.

Adding to 72503331 its reverse (13330527), we get a palindrome (85833858).

The spelling of 72503331 in words is "seventy-two million, five hundred three thousand, three hundred thirty-one".