22241257 has 2 divisors, whose sum is σ = 22241258. Its totient is φ = 22241256.

The previous prime is 22241249. The next prime is 22241269. The reversal of 22241257 is 75214222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21939856 + 301401 = 4684^2 + 549^2 .

It is a cyclic number.

It is not a de Polignac number, because 22241257 - 2³ = 22241249 is a prime.

It is not a weakly prime, because it can be changed into another prime (22241237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11120628 + 11120629.

It is an arithmetic number, because the mean of its divisors is an integer number (11120629).

Almost surely, 2^22241257 is an apocalyptic number.

It is an amenable number.

22241257 is a deficient number, since it is larger than the sum of its proper divisors (1).

22241257 is an equidigital number, since it uses as much as digits as its factorization.

22241257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 25.

The square root of 22241257 is about 4716.0637188231. The cubic root of 22241257 is about 281.2244716253.

Adding to 22241257 its reverse (75214222), we get a palindrome (97455479).

It can be divided in two parts, 2224 and 1257, that added together give a square (3481 = 59²).

The spelling of 22241257 in words is "twenty-two million, two hundred forty-one thousand, two hundred fifty-seven".