23131133 has 4 divisors (see below), whose sum is σ = 23183100. Its totient is φ = 23079168.

The previous prime is 23131111. The next prime is 23131181. The reversal of 23131133 is 33113132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19123129 + 4008004 = 4373^2 + 2002^2 .

It is a cyclic number.

It is not a de Polignac number, because 23131133 - 2²² = 18936829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25310 + ... + 26207.

It is an arithmetic number, because the mean of its divisors is an integer number (5795775).

Almost surely, 2^23131133 is an apocalyptic number.

It is an amenable number.

23131133 is a deficient number, since it is larger than the sum of its proper divisors (51967).

23131133 is an equidigital number, since it uses as much as digits as its factorization.

23131133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51966.

The product of its digits is 162, while the sum is 17.

The square root of 23131133 is about 4809.4836521190. The cubic root of 23131133 is about 284.9261448106.

Adding to 23131133 its reverse (33113132), we get a palindrome (56244265).

The spelling of 23131133 in words is "twenty-three million, one hundred thirty-one thousand, one hundred thirty-three".