72227831 has 8 divisors (see below), whose sum is σ = 79593360. Its totient is φ = 65120832.

The previous prime is 72227819. The next prime is 72227839. The reversal of 72227831 is 13872227.

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 72227831 - 2¹⁸ = 71965687 is a prime.

It is a super-2 number, since 2×72227831² = 10433719141929122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72227839) 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, 64046 + ... + 65163.

It is an arithmetic number, because the mean of its divisors is an integer number (9949170).

Almost surely, 2^72227831 is an apocalyptic number.

72227831 is a deficient number, since it is larger than the sum of its proper divisors (7365529).

72227831 is a wasteful number, since it uses less digits than its factorization.

72227831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129265.

The product of its digits is 9408, while the sum is 32.

The square root of 72227831 is about 8498.6958411276. The cubic root of 72227831 is about 416.4551058969.

The spelling of 72227831 in words is "seventy-two million, two hundred twenty-seven thousand, eight hundred thirty-one".