722478231 has 64 divisors (see below), whose sum is σ = 1149603840. Its totient is φ = 447464160.

The previous prime is 722478221. The next prime is 722478241. The reversal of 722478231 is 132874227.

It is an interprime number because it is at equal distance from previous prime (722478221) and next prime (722478241).

It is not a de Polignac number, because 722478231 - 2⁶ = 722478167 is a prime.

It is a super-2 number, since 2×722478231² = 1043949588537778722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722478221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5515036 + ... + 5515166.

It is an arithmetic number, because the mean of its divisors is an integer number (17962560).

Almost surely, 2^722478231 is an apocalyptic number.

722478231 is a deficient number, since it is larger than the sum of its proper divisors (427125609).

722478231 is a wasteful number, since it uses less digits than its factorization.

722478231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 347 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 722478231 is about 26878.9551694258. The cubic root of 722478231 is about 897.3081010049.

The spelling of 722478231 in words is "seven hundred twenty-two million, four hundred seventy-eight thousand, two hundred thirty-one".