72202331 has 2 divisors, whose sum is σ = 72202332. Its totient is φ = 72202330.

The previous prime is 72202309. The next prime is 72202381. The reversal of 72202331 is 13320227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72202331 - 2²⁶ = 5093467 is a prime.

It is a super-2 number, since 2×72202331² = 10426353203667122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72202381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36101165 + 36101166.

It is an arithmetic number, because the mean of its divisors is an integer number (36101166).

Almost surely, 2^72202331 is an apocalyptic number.

72202331 is a deficient number, since it is larger than the sum of its proper divisors (1).

72202331 is an equidigital number, since it uses as much as digits as its factorization.

72202331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 72202331 is about 8497.1954785094. The cubic root of 72202331 is about 416.4060903717.

Adding to 72202331 its reverse (13320227), we get a palindrome (85522558).

The spelling of 72202331 in words is "seventy-two million, two hundred two thousand, three hundred thirty-one".