722442281 has 16 divisors (see below), whose sum is σ = 807148800. Its totient is φ = 641097600.

The previous prime is 722442277. The next prime is 722442283. The reversal of 722442281 is 182244227.

It is not a de Polignac number, because 722442281 - 2² = 722442277 is a prime.

It is a super-2 number, since 2×722442281² = 1043845698752965922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722442283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72671 + ... + 82011.

It is an arithmetic number, because the mean of its divisors is an integer number (50446800).

Almost surely, 2^722442281 is an apocalyptic number.

It is an amenable number.

722442281 is a deficient number, since it is larger than the sum of its proper divisors (84706519).

722442281 is a wasteful number, since it uses less digits than its factorization.

722442281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9520.

The product of its digits is 14336, while the sum is 32.

The square root of 722442281 is about 26878.2864223149. The cubic root of 722442281 is about 897.2932176216.

The spelling of 722442281 in words is "seven hundred twenty-two million, four hundred forty-two thousand, two hundred eighty-one".