72202231 has 2 divisors, whose sum is σ = 72202232. Its totient is φ = 72202230.

The previous prime is 72202211. The next prime is 72202237. The reversal of 72202231 is 13220227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72202231 - 2⁷ = 72202103 is a prime.

It is a super-2 number, since 2×72202231² = 10426324322754722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72202199 and 72202208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72202237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36101115 + 36101116.

It is an arithmetic number, because the mean of its divisors is an integer number (36101116).

Almost surely, 2^72202231 is an apocalyptic number.

72202231 is a deficient number, since it is larger than the sum of its proper divisors (1).

72202231 is an equidigital number, since it uses as much as digits as its factorization.

72202231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 72202231 is about 8497.1895942129. The cubic root of 72202231 is about 416.4058981313.

Adding to 72202231 its reverse (13220227), we get a palindrome (85422458).

The spelling of 72202231 in words is "seventy-two million, two hundred two thousand, two hundred thirty-one".