22244421 has 16 divisors (see below), whose sum is σ = 32299200. Its totient is φ = 13563648.

The previous prime is 22244413. The next prime is 22244429. The reversal of 22244421 is 12444222.

It is an interprime number because it is at equal distance from previous prime (22244413) and next prime (22244429).

It is not a de Polignac number, because 22244421 - 2³ = 22244413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22244429) 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, 5076 + ... + 8381.

It is an arithmetic number, because the mean of its divisors is an integer number (2018700).

Almost surely, 2^22244421 is an apocalyptic number.

It is an amenable number.

22244421 is a deficient number, since it is larger than the sum of its proper divisors (10054779).

22244421 is a wasteful number, since it uses less digits than its factorization.

22244421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13508.

The product of its digits is 1024, while the sum is 21.

The square root of 22244421 is about 4716.3991561360. The cubic root of 22244421 is about 281.2378064837.

Adding to 22244421 its reverse (12444222), we get a palindrome (34688643).

The spelling of 22244421 in words is "twenty-two million, two hundred forty-four thousand, four hundred twenty-one".