2221322431 has 4 divisors (see below), whose sum is σ = 2246281200. Its totient is φ = 2196363664.

The previous prime is 2221322429. The next prime is 2221322449. The reversal of 2221322431 is 1342231222.

2221322431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2221322431 - 2¹ = 2221322429 is a prime.

It is a super-2 number, since 2×2221322431² = 9868546684927499522, which 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 (2221302431) 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, 12479251 + ... + 12479428.

It is an arithmetic number, because the mean of its divisors is an integer number (561570300).

Almost surely, 2^2221322431 is an apocalyptic number.

2221322431 is a deficient number, since it is larger than the sum of its proper divisors (24958769).

2221322431 is an equidigital number, since it uses as much as digits as its factorization.

2221322431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24958768.

The product of its digits is 1152, while the sum is 22.

The square root of 2221322431 is about 47130.9073857060. The cubic root of 2221322431 is about 1304.7797284355.

Adding to 2221322431 its reverse (1342231222), we get a palindrome (3563553653).

It can be divided in two parts, 22213 and 22431, that added together give a palindrome (44644).

The spelling of 2221322431 in words is "two billion, two hundred twenty-one million, three hundred twenty-two thousand, four hundred thirty-one".