22159145 has 4 divisors (see below), whose sum is σ = 26590980. Its totient is φ = 17727312.

The previous prime is 22159139. The next prime is 22159157. The reversal of 22159145 is 54195122.

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 6255001 + 15904144 = 2501^2 + 3988^2 .

It is a cyclic number.

It is not a de Polignac number, because 22159145 - 2⁴ = 22159129 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215910 + ... + 2215919.

It is an arithmetic number, because the mean of its divisors is an integer number (6647745).

Almost surely, 2^22159145 is an apocalyptic number.

It is an amenable number.

22159145 is a deficient number, since it is larger than the sum of its proper divisors (4431835).

22159145 is an equidigital number, since it uses as much as digits as its factorization.

22159145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4431834.

The product of its digits is 3600, while the sum is 29.

The square root of 22159145 is about 4707.3501038270. The cubic root of 22159145 is about 280.8779627366.

The spelling of 22159145 in words is "twenty-two million, one hundred fifty-nine thousand, one hundred forty-five".