22555145 has 4 divisors (see below), whose sum is σ = 27066180. Its totient is φ = 18044112.

The previous prime is 22555133. The next prime is 22555153. The reversal of 22555145 is 54155522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54155522 = 2 ⋅27077761.

It can be written as a sum of positive squares in 2 ways, for example, as 3519376 + 19035769 = 1876^2 + 4363^2 .

It is a cyclic number.

It is not a de Polignac number, because 22555145 - 2⁴ = 22555129 is a prime.

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, 2255510 + ... + 2255519.

It is an arithmetic number, because the mean of its divisors is an integer number (6766545).

Almost surely, 2^22555145 is an apocalyptic number.

It is an amenable number.

22555145 is a deficient number, since it is larger than the sum of its proper divisors (4511035).

22555145 is an equidigital number, since it uses as much as digits as its factorization.

22555145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4511034.

The product of its digits is 10000, while the sum is 29.

The square root of 22555145 is about 4749.2257263685. The cubic root of 22555145 is about 282.5412579729.

The spelling of 22555145 in words is "twenty-two million, five hundred fifty-five thousand, one hundred forty-five".