722231 has 4 divisors (see below), whose sum is σ = 735912. Its totient is φ = 708552.

The previous prime is 722213. The next prime is 722237. The reversal of 722231 is 132227.

722231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132227 = 23 ⋅5749.

It is a cyclic number.

It is not a de Polignac number, because 722231 - 2⁶ = 722167 is a prime.

It is a super-2 number, since 2×722231² = 1043235234722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6761 + ... + 6866.

It is an arithmetic number, because the mean of its divisors is an integer number (183978).

2⁷²²²³¹ is an apocalyptic number.

722231 is a deficient number, since it is larger than the sum of its proper divisors (13681).

722231 is a wasteful number, since it uses less digits than its factorization.

722231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13680.

The product of its digits is 168, while the sum is 17.

The square root of 722231 is about 849.8417499747. The cubic root of 722231 is about 89.7205736819.

Adding to 722231 its reverse (132227), we get a palindrome (854458).

The spelling of 722231 in words is "seven hundred twenty-two thousand, two hundred thirty-one".