22640227 has 4 divisors (see below), whose sum is σ = 22649760. Its totient is φ = 22630696.

The previous prime is 22640221. The next prime is 22640249. The reversal of 22640227 is 72204622.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22640227 is a prime.

It is a super-2 number, since 2×22640227² = 1025159757223058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22640221) 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, 1974 + ... + 7012.

It is an arithmetic number, because the mean of its divisors is an integer number (5662440).

Almost surely, 2^22640227 is an apocalyptic number.

22640227 is a deficient number, since it is larger than the sum of its proper divisors (9533).

22640227 is an equidigital number, since it uses as much as digits as its factorization.

22640227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9532.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 22640227 is about 4758.1747550925. The cubic root of 22640227 is about 282.8960774139.

Adding to 22640227 its reverse (72204622), we get a palindrome (94844849).

The spelling of 22640227 in words is "twenty-two million, six hundred forty thousand, two hundred twenty-seven".