23133631 has 4 divisors (see below), whose sum is σ = 23300200. Its totient is φ = 22967064.

The previous prime is 23133629. The next prime is 23133637. The reversal of 23133631 is 13633132.

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

It is a cyclic number.

It is not a de Polignac number, because 23133631 - 2¹ = 23133629 is a prime.

It is a super-2 number, since 2×23133631² = 1070329766488322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23133637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83076 + ... + 83353.

It is an arithmetic number, because the mean of its divisors is an integer number (5825050).

Almost surely, 2^23133631 is an apocalyptic number.

23133631 is a deficient number, since it is larger than the sum of its proper divisors (166569).

23133631 is a wasteful number, since it uses less digits than its factorization.

23133631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166568.

The product of its digits is 972, while the sum is 22.

The square root of 23133631 is about 4809.7433403457. The cubic root of 23133631 is about 284.9364011160.

Adding to 23133631 its reverse (13633132), we get a palindrome (36766763).

The spelling of 23133631 in words is "twenty-three million, one hundred thirty-three thousand, six hundred thirty-one".