722255291 has 2 divisors, whose sum is σ = 722255292. Its totient is φ = 722255290.

The previous prime is 722255279. The next prime is 722255309. The reversal of 722255291 is 192552227.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722255291 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (722255491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361127645 + 361127646.

It is an arithmetic number, because the mean of its divisors is an integer number (361127646).

Almost surely, 2^722255291 is an apocalyptic number.

722255291 is a deficient number, since it is larger than the sum of its proper divisors (1).

722255291 is an equidigital number, since it uses as much as digits as its factorization.

722255291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 35.

The square root of 722255291 is about 26874.8077388472. The cubic root of 722255291 is about 897.2157953641.

The spelling of 722255291 in words is "seven hundred twenty-two million, two hundred fifty-five thousand, two hundred ninety-one".