22443907 has 4 divisors (see below), whose sum is σ = 23167936. Its totient is φ = 21719880.

The previous prime is 22443901. The next prime is 22443919. The reversal of 22443907 is 70934422.

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 22443907 - 2³ = 22443899 is a prime.

It is a super-2 number, since 2×22443907² = 1007457922849298, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 723997 = 22443907 / (2 + 2 + 4 + 4 + 3 + 9 + 0 + 7).

It is the 4738-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22443901) by changing a digit.

It is a nontrivial repunit in base 4737.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361968 + ... + 362029.

It is an arithmetic number, because the mean of its divisors is an integer number (5791984).

Almost surely, 2^22443907 is an apocalyptic number.

22443907 is a deficient number, since it is larger than the sum of its proper divisors (724029).

22443907 is an equidigital number, since it uses as much as digits as its factorization.

22443907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724028.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 22443907 is about 4737.5000791557. The cubic root of 22443907 is about 282.0760110643.

The spelling of 22443907 in words is "twenty-two million, four hundred forty-three thousand, nine hundred seven".