23220555431 has 4 divisors (see below), whose sum is σ = 23760568392. Its totient is φ = 22680542472.

The previous prime is 23220555427. The next prime is 23220555509. The reversal of 23220555431 is 13455502232.

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 23220555431 - 2² = 23220555427 is a prime.

It is a super-2 number, since 2×23220555431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23220555401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270006416 + ... + 270006501.

It is an arithmetic number, because the mean of its divisors is an integer number (5940142098).

Almost surely, 2^23220555431 is an apocalyptic number.

23220555431 is a deficient number, since it is larger than the sum of its proper divisors (540012961).

23220555431 is an equidigital number, since it uses as much as digits as its factorization.

23220555431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540012960.

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 23220555431 in words is "twenty-three billion, two hundred twenty million, five hundred fifty-five thousand, four hundred thirty-one".