23663131 has 4 divisors (see below), whose sum is σ = 23701264. Its totient is φ = 23625000.

The previous prime is 23663119. The next prime is 23663141. The reversal of 23663131 is 13136632.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23663131 is a prime.

It is a super-2 number, since 2×23663131² = 1119887537446322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23663096 and 23663105.

It is not an unprimeable number, because it can be changed into a prime (23663111) 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 in 3 ways as a sum of consecutive naturals, for example, 18120 + ... + 19381.

It is an arithmetic number, because the mean of its divisors is an integer number (5925316).

Almost surely, 2^23663131 is an apocalyptic number.

23663131 is a deficient number, since it is larger than the sum of its proper divisors (38133).

23663131 is an equidigital number, since it uses as much as digits as its factorization.

23663131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38132.

The product of its digits is 1944, while the sum is 25.

The square root of 23663131 is about 4864.4764363701. The cubic root of 23663131 is about 287.0939689948.

Adding to 23663131 its reverse (13136632), we get a palindrome (36799763).

The spelling of 23663131 in words is "twenty-three million, six hundred sixty-three thousand, one hundred thirty-one".