23131211 has 2 divisors, whose sum is σ = 23131212. Its totient is φ = 23131210.

The previous prime is 23131193. The next prime is 23131231. The reversal of 23131211 is 11213132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23131211 - 2¹⁰ = 23130187 is a prime.

It is not a weakly prime, because it can be changed into another prime (23131231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565605 + 11565606.

It is an arithmetic number, because the mean of its divisors is an integer number (11565606).

Almost surely, 2^23131211 is an apocalyptic number.

23131211 is a deficient number, since it is larger than the sum of its proper divisors (1).

23131211 is an equidigital number, since it uses as much as digits as its factorization.

23131211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 14.

The square root of 23131211 is about 4809.4917610908. The cubic root of 23131211 is about 284.9264650747.

Adding to 23131211 its reverse (11213132), we get a palindrome (34344343).

The spelling of 23131211 in words is "twenty-three million, one hundred thirty-one thousand, two hundred eleven".