72232291 has 8 divisors (see below), whose sum is σ = 72979920. Its totient is φ = 71488128.

The previous prime is 72232289. The next prime is 72232333. The reversal of 72232291 is 19223227.

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 72232291 - 2¹ = 72232289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72232261) by changing a digit.

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, 63415 + ... + 64543.

It is an arithmetic number, because the mean of its divisors is an integer number (9122490).

Almost surely, 2^72232291 is an apocalyptic number.

72232291 is a deficient number, since it is larger than the sum of its proper divisors (747629).

72232291 is a wasteful number, since it uses less digits than its factorization.

72232291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733.

The product of its digits is 3024, while the sum is 28.

The square root of 72232291 is about 8498.9582302774. The cubic root of 72232291 is about 416.4636776229.

The spelling of 72232291 in words is "seventy-two million, two hundred thirty-two thousand, two hundred ninety-one".