22270257 has 12 divisors (see below), whose sum is σ = 32953284. Its totient is φ = 14484480.

The previous prime is 22270249. The next prime is 22270267. The reversal of 22270257 is 75207222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1147041 + 21123216 = 1071^2 + 4596^2 .

It is not a de Polignac number, because 22270257 - 2³ = 22270249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22270257.

It is not an unprimeable number, because it can be changed into a prime (22270207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29808 + ... + 30545.

It is an arithmetic number, because the mean of its divisors is an integer number (2746107).

Almost surely, 2^22270257 is an apocalyptic number.

It is an amenable number.

22270257 is a deficient number, since it is larger than the sum of its proper divisors (10683027).

22270257 is a wasteful number, since it uses less digits than its factorization.

22270257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60400 (or 60397 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 22270257 is about 4719.1373152304. The cubic root of 22270257 is about 281.3466464891.

Adding to 22270257 its reverse (75207222), we get a palindrome (97477479).

The spelling of 22270257 in words is "twenty-two million, two hundred seventy thousand, two hundred fifty-seven".