722331 has 16 divisors (see below), whose sum is σ = 1105920. Its totient is φ = 465480.

The previous prime is 722321. The next prime is 722333. The reversal of 722331 is 133227.

722331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 722331 - 2⁵ = 722299 is a prime.

It is a super-2 number, since 2×722331² = 1043524147122, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 722331.

It is not an unprimeable number, because it can be changed into a prime (722333) 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, 406 + ... + 1268.

It is an arithmetic number, because the mean of its divisors is an integer number (69120).

2⁷²²³³¹ is an apocalyptic number.

722331 is a deficient number, since it is larger than the sum of its proper divisors (383589).

722331 is a wasteful number, since it uses less digits than its factorization.

722331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903 (or 897 counting only the distinct ones).

The product of its digits is 252, while the sum is 18.

The square root of 722331 is about 849.9005824213. The cubic root of 722331 is about 89.7247143900.

Adding to 722331 its reverse (133227), we get a palindrome (855558).

The spelling of 722331 in words is "seven hundred twenty-two thousand, three hundred thirty-one".