22056431 has 4 divisors (see below), whose sum is σ = 22127664. Its totient is φ = 21985200.

The previous prime is 22056413. The next prime is 22056449. The reversal of 22056431 is 13465022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13465022 = 2 ⋅6732511.

It is an interprime number because it is at equal distance from previous prime (22056413) and next prime (22056449).

It is a cyclic number.

It is not a de Polignac number, because 22056431 - 2¹⁸ = 21794287 is a prime.

It is a super-2 number, since 2×22056431² = 972972296915522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22056397 and 22056406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22056491) 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, 35150 + ... + 35771.

It is an arithmetic number, because the mean of its divisors is an integer number (5531916).

Almost surely, 2^22056431 is an apocalyptic number.

22056431 is a deficient number, since it is larger than the sum of its proper divisors (71233).

22056431 is an equidigital number, since it uses as much as digits as its factorization.

22056431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71232.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 22056431 is about 4696.4274720259. The cubic root of 22056431 is about 280.4433071219.

The spelling of 22056431 in words is "twenty-two million, fifty-six thousand, four hundred thirty-one".