22459145 has 4 divisors (see below), whose sum is σ = 26950980. Its totient is φ = 17967312.

The previous prime is 22459141. The next prime is 22459181. The reversal of 22459145 is 54195422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8231161 + 14227984 = 2869^2 + 3772^2 .

It is a cyclic number.

It is not a de Polignac number, because 22459145 - 2² = 22459141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22459141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2245910 + ... + 2245919.

It is an arithmetic number, because the mean of its divisors is an integer number (6737745).

Almost surely, 2^22459145 is an apocalyptic number.

It is an amenable number.

22459145 is a deficient number, since it is larger than the sum of its proper divisors (4491835).

22459145 is an equidigital number, since it uses as much as digits as its factorization.

22459145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491834.

The product of its digits is 14400, while the sum is 32.

The square root of 22459145 is about 4739.1080384393. The cubic root of 22459145 is about 282.1398339075.

The spelling of 22459145 in words is "twenty-two million, four hundred fifty-nine thousand, one hundred forty-five".