23213031 has 4 divisors (see below), whose sum is σ = 30950712. Its totient is φ = 15475352.

The previous prime is 23212999. The next prime is 23213033. The reversal of 23213031 is 13031232.

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 23213031 - 2⁵ = 23212999 is a prime.

It is a super-2 number, since 2×23213031² = 1077689616413922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23213031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23213033) 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, 3868836 + ... + 3868841.

It is an arithmetic number, because the mean of its divisors is an integer number (7737678).

Almost surely, 2^23213031 is an apocalyptic number.

23213031 is a deficient number, since it is larger than the sum of its proper divisors (7737681).

23213031 is an equidigital number, since it uses as much as digits as its factorization.

23213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7737680.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 23213031 is about 4817.9903486827. The cubic root of 23213031 is about 285.2620181933.

Adding to 23213031 its reverse (13031232), we get a palindrome (36244263).

The spelling of 23213031 in words is "twenty-three million, two hundred thirteen thousand, thirty-one".