13540022257 has 2 divisors, whose sum is σ = 13540022258. Its totient is φ = 13540022256.

The previous prime is 13540022219. The next prime is 13540022299. The reversal of 13540022257 is 75222004531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11084720656 + 2455301601 = 105284^2 + 49551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13540022257 is a prime.

It is not a weakly prime, because it can be changed into another prime (13540022857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6770011128 + 6770011129.

It is an arithmetic number, because the mean of its divisors is an integer number (6770011129).

Almost surely, 2^13540022257 is an apocalyptic number.

It is an amenable number.

13540022257 is a deficient number, since it is larger than the sum of its proper divisors (1).

13540022257 is an equidigital number, since it uses as much as digits as its factorization.

13540022257 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 31.

Adding to 13540022257 its reverse (75222004531), we get a palindrome (88762026788).

The spelling of 13540022257 in words is "thirteen billion, five hundred forty million, twenty-two thousand, two hundred fifty-seven".