72549331 has 8 divisors (see below), whose sum is σ = 75138944. Its totient is φ = 69975360.

The previous prime is 72549293. The next prime is 72549343. The reversal of 72549331 is 13394527.

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

It is a cyclic number.

It is not a de Polignac number, because 72549331 - 2²⁵ = 38994899 is a prime.

It is a super-2 number, since 2×72549331² = 10526810857095122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72549361) 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, 5965 + ... + 13441.

It is an arithmetic number, because the mean of its divisors is an integer number (9392368).

Almost surely, 2^72549331 is an apocalyptic number.

72549331 is a deficient number, since it is larger than the sum of its proper divisors (2589613).

72549331 is a wasteful number, since it uses less digits than its factorization.

72549331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7821.

The product of its digits is 22680, while the sum is 34.

The square root of 72549331 is about 8517.5895064273. The cubic root of 72549331 is about 417.0720986696.

The spelling of 72549331 in words is "seventy-two million, five hundred forty-nine thousand, three hundred thirty-one".