72232331 has 4 divisors (see below), whose sum is σ = 72342600. Its totient is φ = 72122064.

The previous prime is 72232289. The next prime is 72232333. The reversal of 72232331 is 13323227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72232331 - 2⁶ = 72232267 is a prime.

It is a super-2 number, since 2×72232331² = 10435019283387122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72232297 and 72232306.

It is not an unprimeable number, because it can be changed into a prime (72232333) 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 3 ways as a sum of consecutive naturals, for example, 54146 + ... + 55463.

It is an arithmetic number, because the mean of its divisors is an integer number (18085650).

Almost surely, 2^72232331 is an apocalyptic number.

72232331 is a deficient number, since it is larger than the sum of its proper divisors (110269).

72232331 is a wasteful number, since it uses less digits than its factorization.

72232331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110268.

The product of its digits is 1512, while the sum is 23.

The square root of 72232331 is about 8498.9605835067. The cubic root of 72232331 is about 416.4637544978.

Adding to 72232331 its reverse (13323227), we get a palindrome (85555558).

The spelling of 72232331 in words is "seventy-two million, two hundred thirty-two thousand, three hundred thirty-one".