23143631 has 6 divisors (see below), whose sum is σ = 26922240. Its totient is φ = 19837356.

The previous prime is 23143607. The next prime is 23143667. The reversal of 23143631 is 13634132.

It is a de Polignac number, because none of the positive numbers 2^k-23143631 is a prime.

It is a super-2 number, since 2×23143631² = 1071255311728322, 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 = 23143597 and 23143606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23143031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 236111 + ... + 236208.

It is an arithmetic number, because the mean of its divisors is an integer number (4487040).

Almost surely, 2^23143631 is an apocalyptic number.

23143631 is a deficient number, since it is larger than the sum of its proper divisors (3778609).

23143631 is an equidigital number, since it uses as much as digits as its factorization.

23143631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472333 (or 472326 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

The square root of 23143631 is about 4810.7827845373. The cubic root of 23143631 is about 284.9774517916.

Adding to 23143631 its reverse (13634132), we get a palindrome (36777763).

The spelling of 23143631 in words is "twenty-three million, one hundred forty-three thousand, six hundred thirty-one".