23131166 has 4 divisors (see below), whose sum is σ = 34696752. Its totient is φ = 11565582.

The previous prime is 23131111. The next prime is 23131181. The reversal of 23131166 is 66113132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782790 + ... + 5782793.

It is an arithmetic number, because the mean of its divisors is an integer number (8674188).

Almost surely, 2^23131166 is an apocalyptic number.

23131166 is a deficient number, since it is larger than the sum of its proper divisors (11565586).

23131166 is a wasteful number, since it uses less digits than its factorization.

23131166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11565585.

The product of its digits is 648, while the sum is 23.

The square root of 23131166 is about 4809.4870828395. The cubic root of 23131166 is about 284.9262803071.

Adding to 23131166 its reverse (66113132), we get a palindrome (89244298).

The spelling of 23131166 in words is "twenty-three million, one hundred thirty-one thousand, one hundred sixty-six".