22149423 has 8 divisors (see below), whose sum is σ = 32814000. Its totient is φ = 14766264.

The previous prime is 22149397. The next prime is 22149431. The reversal of 22149423 is 32494122.

It is not a de Polignac number, because 22149423 - 2⁸ = 22149167 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 820349 = 22149423 / (2 + 2 + 1 + 4 + 9 + 4 + 2 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22149433) 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, 410148 + ... + 410201.

It is an arithmetic number, because the mean of its divisors is an integer number (4101750).

Almost surely, 2^22149423 is an apocalyptic number.

22149423 is a deficient number, since it is larger than the sum of its proper divisors (10664577).

22149423 is an equidigital number, since it uses as much as digits as its factorization.

22149423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820358 (or 820352 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 22149423 is about 4706.3173501157. The cubic root of 22149423 is about 280.8368796984.

The spelling of 22149423 in words is "twenty-two million, one hundred forty-nine thousand, four hundred twenty-three".