22430257 has 2 divisors, whose sum is σ = 22430258. Its totient is φ = 22430256.

The previous prime is 22430237. The next prime is 22430269. The reversal of 22430257 is 75203422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12702096 + 9728161 = 3564^2 + 3119^2 .

It is a cyclic number.

It is not a de Polignac number, because 22430257 - 2¹¹ = 22428209 is a prime.

It is equal to p_1414537 and since 22430257 and 1414537 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (22430227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11215128 + 11215129.

It is an arithmetic number, because the mean of its divisors is an integer number (11215129).

Almost surely, 2^22430257 is an apocalyptic number.

It is an amenable number.

22430257 is a deficient number, since it is larger than the sum of its proper divisors (1).

22430257 is an equidigital number, since it uses as much as digits as its factorization.

22430257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 22430257 is about 4736.0592268256. The cubic root of 22430257 is about 282.0188148673.

Adding to 22430257 its reverse (75203422), we get a palindrome (97633679).

The spelling of 22430257 in words is "twenty-two million, four hundred thirty thousand, two hundred fifty-seven".