23131222 has 16 divisors (see below), whose sum is σ = 35248752. Its totient is φ = 11383200.

The previous prime is 23131211. The next prime is 23131231. The reversal of 23131222 is 22213132.

It is a junction number, because it is equal to n+sod(n) for n = 23131196 and 23131205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61828 + ... + 62200.

It is an arithmetic number, because the mean of its divisors is an integer number (2203047).

Almost surely, 2^23131222 is an apocalyptic number.

23131222 is a deficient number, since it is larger than the sum of its proper divisors (12117530).

23131222 is a wasteful number, since it uses less digits than its factorization.

23131222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783.

The product of its digits is 144, while the sum is 16.

The square root of 23131222 is about 4809.4929046626. The cubic root of 23131222 is about 284.9265102401.

Adding to 23131222 its reverse (22213132), we get a palindrome (45344354).

The spelling of 23131222 in words is "twenty-three million, one hundred thirty-one thousand, two hundred twenty-two".