72942231 has 16 divisors (see below), whose sum is σ = 99889920. Its totient is φ = 47328000.

The previous prime is 72942229. The next prime is 72942253. The reversal of 72942231 is 13224927.

It is not a de Polignac number, because 72942231 - 2¹ = 72942229 is a prime.

It is a super-2 number, since 2×72942231² = 10641138126514722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72942271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16231 + ... + 20231.

It is an arithmetic number, because the mean of its divisors is an integer number (6243120).

Almost surely, 2^72942231 is an apocalyptic number.

72942231 is a deficient number, since it is larger than the sum of its proper divisors (26947689).

72942231 is a wasteful number, since it uses less digits than its factorization.

72942231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4166.

The product of its digits is 6048, while the sum is 30.

The square root of 72942231 is about 8540.6224012071. The cubic root of 72942231 is about 417.8236456831.

The spelling of 72942231 in words is "seventy-two million, nine hundred forty-two thousand, two hundred thirty-one".