22440221431 has 16 divisors (see below), whose sum is σ = 23295535200. Its totient is φ = 21590507008.

The previous prime is 22440221429. The next prime is 22440221443. The reversal of 22440221431 is 13412204422.

It is a cyclic number.

It is not a de Polignac number, because 22440221431 - 2¹ = 22440221429 is a prime.

It is a super-2 number, since 2×22440221431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22440221396 and 22440221405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22440221471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15724740 + ... + 15726166.

It is an arithmetic number, because the mean of its divisors is an integer number (1455970950).

Almost surely, 2^22440221431 is an apocalyptic number.

22440221431 is a deficient number, since it is larger than the sum of its proper divisors (855313769).

22440221431 is a wasteful number, since it uses less digits than its factorization.

22440221431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 22440221431 its reverse (13412204422), we get a palindrome (35852425853).

The spelling of 22440221431 in words is "twenty-two billion, four hundred forty million, two hundred twenty-one thousand, four hundred thirty-one".