722257331 has 2 divisors, whose sum is σ = 722257332. Its totient is φ = 722257330.

The previous prime is 722257309. The next prime is 722257343. The reversal of 722257331 is 133752227.

722257331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 722257331 - 2¹⁰ = 722256307 is a prime.

It is a super-2 number, since 2×722257331² = 1043311304366487122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (722257351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361128665 + 361128666.

It is an arithmetic number, because the mean of its divisors is an integer number (361128666).

Almost surely, 2^722257331 is an apocalyptic number.

722257331 is a deficient number, since it is larger than the sum of its proper divisors (1).

722257331 is an equidigital number, since it uses as much as digits as its factorization.

722257331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 32.

The square root of 722257331 is about 26874.8456925803. The cubic root of 722257331 is about 897.2166400878.

The spelling of 722257331 in words is "seven hundred twenty-two million, two hundred fifty-seven thousand, three hundred thirty-one".