22257145 has 4 divisors (see below), whose sum is σ = 26708580. Its totient is φ = 17805712.

The previous prime is 22257119. The next prime is 22257149. The reversal of 22257145 is 54175222.

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 7634169 + 14622976 = 2763^2 + 3824^2 .

It is a cyclic number.

It is not a de Polignac number, because 22257145 - 2¹¹ = 22255097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22257149) 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, 2225710 + ... + 2225719.

It is an arithmetic number, because the mean of its divisors is an integer number (6677145).

Almost surely, 2^22257145 is an apocalyptic number.

It is an amenable number.

22257145 is a deficient number, since it is larger than the sum of its proper divisors (4451435).

22257145 is an equidigital number, since it uses as much as digits as its factorization.

22257145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451434.

The product of its digits is 5600, while the sum is 28.

The square root of 22257145 is about 4717.7478737211. The cubic root of 22257145 is about 281.2914197434.

The spelling of 22257145 in words is "twenty-two million, two hundred fifty-seven thousand, one hundred forty-five".