22227257 has 4 divisors (see below), whose sum is σ = 23937060. Its totient is φ = 20517456.

The previous prime is 22227229. The next prime is 22227277. The reversal of 22227257 is 75272222.

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 11363641 + 10863616 = 3371^2 + 3296^2 .

It is a cyclic number.

It is not a de Polignac number, because 22227257 - 2¹² = 22223161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22227277) 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, 854882 + ... + 854907.

It is an arithmetic number, because the mean of its divisors is an integer number (5984265).

Almost surely, 2^22227257 is an apocalyptic number.

It is an amenable number.

22227257 is a deficient number, since it is larger than the sum of its proper divisors (1709803).

22227257 is a wasteful number, since it uses less digits than its factorization.

22227257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709802.

The product of its digits is 7840, while the sum is 29.

The square root of 22227257 is about 4714.5791964925. The cubic root of 22227257 is about 281.1654526441.

Adding to 22227257 its reverse (75272222), we get a palindrome (97499479).

The spelling of 22227257 in words is "twenty-two million, two hundred twenty-seven thousand, two hundred fifty-seven".