23221444 has 24 divisors (see below), whose sum is σ = 42678720. Its totient is φ = 11034144.

The previous prime is 23221417. The next prime is 23221447. The reversal of 23221444 is 44412232.

It is a happy number.

It is a super-2 number, since 2×23221444² = 1078470922890272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23221447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15187 + ... + 16645.

It is an arithmetic number, because the mean of its divisors is an integer number (1778280).

Almost surely, 2^23221444 is an apocalyptic number.

It is an amenable number.

23221444 is a deficient number, since it is larger than the sum of its proper divisors (19457276).

23221444 is a wasteful number, since it uses less digits than its factorization.

23221444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659 (or 1657 counting only the distinct ones).

The product of its digits is 1536, while the sum is 22.

The square root of 23221444 is about 4818.8633514554. The cubic root of 23221444 is about 285.2964761304.

Adding to 23221444 its reverse (44412232), we get a palindrome (67633676).

The spelling of 23221444 in words is "twenty-three million, two hundred twenty-one thousand, four hundred forty-four".