23431223011 has 4 divisors (see below), whose sum is σ = 26778540592. Its totient is φ = 20083905432.

The previous prime is 23431222987. The next prime is 23431223077. The reversal of 23431223011 is 11032213432.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23431223011 is a prime.

It is a super-2 number, since 2×23431223011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23431223911) 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, 1673658780 + ... + 1673658793.

It is an arithmetic number, because the mean of its divisors is an integer number (6694635148).

Almost surely, 2^23431223011 is an apocalyptic number.

23431223011 is a deficient number, since it is larger than the sum of its proper divisors (3347317581).

23431223011 is an equidigital number, since it uses as much as digits as its factorization.

23431223011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3347317580.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 23431223011 its reverse (11032213432), we get a palindrome (34463436443).

The spelling of 23431223011 in words is "twenty-three billion, four hundred thirty-one million, two hundred twenty-three thousand, eleven".