722868531 has 48 divisors (see below), whose sum is σ = 1244004480. Its totient is φ = 369102720.

The previous prime is 722868521. The next prime is 722868539. The reversal of 722868531 is 135868227.

It is not a de Polignac number, because 722868531 - 2⁹ = 722868019 is a prime.

It is a super-2 number, since 2×722868531² = 1045077826220195922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (722868539) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91615 + ... + 99191.

It is an arithmetic number, because the mean of its divisors is an integer number (25916760).

Almost surely, 2^722868531 is an apocalyptic number.

722868531 is a deficient number, since it is larger than the sum of its proper divisors (521135949).

722868531 is a wasteful number, since it uses less digits than its factorization.

722868531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7664 (or 7657 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 722868531 is about 26886.2145159931. The cubic root of 722868531 is about 897.4696543408.

The spelling of 722868531 in words is "seven hundred twenty-two million, eight hundred sixty-eight thousand, five hundred thirty-one".