23161664 has 14 divisors (see below), whose sum is σ = 45961554. Its totient is φ = 11580800.

The previous prime is 23161661. The next prime is 23161669. The reversal of 23161664 is 46616132.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15366400 + 7795264 = 3920^2 + 2792^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23161661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180887 + ... + 181014.

Almost surely, 2^23161664 is an apocalyptic number.

It is an amenable number.

23161664 is a deficient number, since it is larger than the sum of its proper divisors (22799890).

23161664 is an equidigital number, since it uses as much as digits as its factorization.

23161664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361913 (or 361903 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 23161664 is about 4812.6566468012. The cubic root of 23161664 is about 285.0514485963.

Adding to 23161664 its reverse (46616132), we get a palindrome (69777796).

The spelling of 23161664 in words is "twenty-three million, one hundred sixty-one thousand, six hundred sixty-four".