72288631 has 2 divisors, whose sum is σ = 72288632. Its totient is φ = 72288630.

The previous prime is 72288611. The next prime is 72288763. The reversal of 72288631 is 13688227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72288631 - 2¹⁷ = 72157559 is a prime.

It is a super-2 number, since 2×72288631² = 10451292343708322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72288611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36144315 + 36144316.

It is an arithmetic number, because the mean of its divisors is an integer number (36144316).

Almost surely, 2^72288631 is an apocalyptic number.

72288631 is a deficient number, since it is larger than the sum of its proper divisors (1).

72288631 is an equidigital number, since it uses as much as digits as its factorization.

72288631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 37.

The square root of 72288631 is about 8502.2721080897. The cubic root of 72288631 is about 416.5719277583.

The spelling of 72288631 in words is "seventy-two million, two hundred eighty-eight thousand, six hundred thirty-one".