23131867 has 4 divisors (see below), whose sum is σ = 25234776. Its totient is φ = 21028960.

The previous prime is 23131861. The next prime is 23131877. The reversal of 23131867 is 76813132.

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 23131867 - 2¹¹ = 23129819 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23131861) 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, 1051438 + ... + 1051459.

It is an arithmetic number, because the mean of its divisors is an integer number (6308694).

Almost surely, 2^23131867 is an apocalyptic number.

23131867 is a deficient number, since it is larger than the sum of its proper divisors (2102909).

23131867 is a wasteful number, since it uses less digits than its factorization.

23131867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102908.

The product of its digits is 6048, while the sum is 31.

The square root of 23131867 is about 4809.5599590815. The cubic root of 23131867 is about 284.9291585494.

Adding to 23131867 its reverse (76813132), we get a palindrome (99944999).

The spelling of 23131867 in words is "twenty-three million, one hundred thirty-one thousand, eight hundred sixty-seven".