22515140237 has 2 divisors, whose sum is σ = 22515140238. Its totient is φ = 22515140236.

The previous prime is 22515140227. The next prime is 22515140287. The reversal of 22515140237 is 73204151522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18364044196 + 4151096041 = 135514^2 + 64429^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22515140237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22515140227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11257570118 + 11257570119.

It is an arithmetic number, because the mean of its divisors is an integer number (11257570119).

Almost surely, 2^22515140237 is an apocalyptic number.

It is an amenable number.

22515140237 is a deficient number, since it is larger than the sum of its proper divisors (1).

22515140237 is an equidigital number, since it uses as much as digits as its factorization.

22515140237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 32.

Adding to 22515140237 its reverse (73204151522), we get a palindrome (95719291759).

The spelling of 22515140237 in words is "twenty-two billion, five hundred fifteen million, one hundred forty thousand, two hundred thirty-seven".