22531149 has 8 divisors (see below), whose sum is σ = 33379520. Its totient is φ = 15020748.

The previous prime is 22531129. The next prime is 22531153. The reversal of 22531149 is 94113522.

It is not a de Polignac number, because 22531149 - 2¹⁹ = 22006861 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: 834487 = 22531149 / (2 + 2 + 5 + 3 + 1 + 1 + 4 + 9).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22531129) 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, 417217 + ... + 417270.

It is an arithmetic number, because the mean of its divisors is an integer number (4172440).

Almost surely, 2^22531149 is an apocalyptic number.

It is an amenable number.

22531149 is a deficient number, since it is larger than the sum of its proper divisors (10848371).

22531149 is an equidigital number, since it uses as much as digits as its factorization.

22531149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834496 (or 834490 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 22531149 is about 4746.6987475508. The cubic root of 22531149 is about 282.4410256198.

The spelling of 22531149 in words is "twenty-two million, five hundred thirty-one thousand, one hundred forty-nine".