23220442331 has 2 divisors, whose sum is σ = 23220442332. Its totient is φ = 23220442330.

The previous prime is 23220442249. The next prime is 23220442363. The reversal of 23220442331 is 13324402232.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23220442331 is a prime.

It is a super-2 number, since 2×23220442331² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23220442331.

It is not a weakly prime, because it can be changed into another prime (23220442381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11610221165 + 11610221166.

It is an arithmetic number, because the mean of its divisors is an integer number (11610221166).

Almost surely, 2^23220442331 is an apocalyptic number.

23220442331 is a deficient number, since it is larger than the sum of its proper divisors (1).

23220442331 is an equidigital number, since it uses as much as digits as its factorization.

23220442331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 23220442331 its reverse (13324402232), we get a palindrome (36544844563).

The spelling of 23220442331 in words is "twenty-three billion, two hundred twenty million, four hundred forty-two thousand, three hundred thirty-one".