23131229 has 4 divisors (see below), whose sum is σ = 25234080. Its totient is φ = 21028380.

The previous prime is 23131211. The next prime is 23131231. The reversal of 23131229 is 92213132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23131229 - 2²⁴ = 6354013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051409 + ... + 1051430.

It is an arithmetic number, because the mean of its divisors is an integer number (6308520).

Almost surely, 2^23131229 is an apocalyptic number.

It is an amenable number.

23131229 is a deficient number, since it is larger than the sum of its proper divisors (2102851).

23131229 is a wasteful number, since it uses less digits than its factorization.

23131229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102850.

The product of its digits is 648, while the sum is 23.

The square root of 23131229 is about 4809.4936323900. The cubic root of 23131229 is about 284.9265389817.

The spelling of 23131229 in words is "twenty-three million, one hundred thirty-one thousand, two hundred twenty-nine".