72331163 has 4 divisors (see below), whose sum is σ = 72351048. Its totient is φ = 72311280.

The previous prime is 72331151. The next prime is 72331169. The reversal of 72331163 is 36113327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36113327 = 821 ⋅43987.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72331163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72331169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2753 + ... + 12338.

It is an arithmetic number, because the mean of its divisors is an integer number (18087762).

Almost surely, 2^72331163 is an apocalyptic number.

72331163 is a deficient number, since it is larger than the sum of its proper divisors (19885).

72331163 is a wasteful number, since it uses less digits than its factorization.

72331163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19884.

The product of its digits is 2268, while the sum is 26.

The square root of 72331163 is about 8504.7729540535. The cubic root of 72331163 is about 416.6536103287.

The spelling of 72331163 in words is "seventy-two million, three hundred thirty-one thousand, one hundred sixty-three".