8722231 has 4 divisors (see below), whose sum is σ = 9968272. Its totient is φ = 7476192.

The previous prime is 8722223. The next prime is 8722237. The reversal of 8722231 is 1322278.

8722231 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: 1322278 = 2 ⋅661139.

It is a cyclic number.

It is not a de Polignac number, because 8722231 - 2³ = 8722223 is a prime.

It is a super-2 number, since 2×8722231² = 152154627234722, which contains 22 as substring.

It is a Duffinian number.

8722231 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8722196 and 8722205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8722237) 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, 623010 + ... + 623023.

It is an arithmetic number, because the mean of its divisors is an integer number (2492068).

Almost surely, 2^8722231 is an apocalyptic number.

8722231 is a deficient number, since it is larger than the sum of its proper divisors (1246041).

8722231 is a wasteful number, since it uses less digits than its factorization.

8722231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246040.

The product of its digits is 1344, while the sum is 25.

The square root of 8722231 is about 2953.3423438538. The cubic root of 8722231 is about 205.8460454631.

The spelling of 8722231 in words is "eight million, seven hundred twenty-two thousand, two hundred thirty-one".