22490137 has 2 divisors, whose sum is σ = 22490138. Its totient is φ = 22490136.

The previous prime is 22490123. The next prime is 22490177. The reversal of 22490137 is 73109422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21678336 + 811801 = 4656^2 + 901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22490137 is a prime.

It is not a weakly prime, because it can be changed into another prime (22490107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11245068 + 11245069.

It is an arithmetic number, because the mean of its divisors is an integer number (11245069).

Almost surely, 2^22490137 is an apocalyptic number.

It is an amenable number.

22490137 is a deficient number, since it is larger than the sum of its proper divisors (1).

22490137 is an equidigital number, since it uses as much as digits as its factorization.

22490137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 22490137 is about 4742.3767248079. The cubic root of 22490137 is about 282.2695517982.

Adding to 22490137 its reverse (73109422), we get a palindrome (95599559).

The spelling of 22490137 in words is "twenty-two million, four hundred ninety thousand, one hundred thirty-seven".