23161312 has 12 divisors (see below), whose sum is σ = 45598896. Its totient is φ = 11580640.

The previous prime is 23161283. The next prime is 23161319. The reversal of 23161312 is 21316132.

It is a super-2 number, since 2×23161312² = 1072892747122688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23161312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23161319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361864 + ... + 361927.

It is an arithmetic number, because the mean of its divisors is an integer number (3799908).

Almost surely, 2^23161312 is an apocalyptic number.

It is an amenable number.

23161312 is a deficient number, since it is larger than the sum of its proper divisors (22437584).

23161312 is an equidigital number, since it uses as much as digits as its factorization.

23161312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723801 (or 723793 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 23161312 is about 4812.6200764241. The cubic root of 23161312 is about 285.0500045634.

Adding to 23161312 its reverse (21316132), we get a palindrome (44477444).

The spelling of 23161312 in words is "twenty-three million, one hundred sixty-one thousand, three hundred twelve".