22508137 has 2 divisors, whose sum is σ = 22508138. Its totient is φ = 22508136.

The previous prime is 22508117. The next prime is 22508203. The reversal of 22508137 is 73180522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22505536 + 2601 = 4744^2 + 51^2 .

It is a cyclic number.

It is not a de Polignac number, because 22508137 - 2⁷ = 22508009 is a prime.

It is not a weakly prime, because it can be changed into another prime (22508107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11254068 + 11254069.

It is an arithmetic number, because the mean of its divisors is an integer number (11254069).

Almost surely, 2^22508137 is an apocalyptic number.

It is an amenable number.

22508137 is a deficient number, since it is larger than the sum of its proper divisors (1).

22508137 is an equidigital number, since it uses as much as digits as its factorization.

22508137 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 28.

The square root of 22508137 is about 4744.2741278303. The cubic root of 22508137 is about 282.3448366078.

Adding to 22508137 its reverse (73180522), we get a palindrome (95688659).

It can be divided in two parts, 2250813 and 7, that multiplied together give a triangular number (15755691 = T₅₆₁₃).

The spelling of 22508137 in words is "twenty-two million, five hundred eight thousand, one hundred thirty-seven".