11231262557 has 2 divisors, whose sum is σ = 11231262558. Its totient is φ = 11231262556.

The previous prime is 11231262547. The next prime is 11231262571. The reversal of 11231262557 is 75526213211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6566509156 + 4664753401 = 81034^2 + 68299^2 .

It is an emirp because it is prime and its reverse (75526213211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11231262557 - 2⁴ = 11231262541 is a prime.

It is a super-2 number, since 2×11231262557² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11231262547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5615631278 + 5615631279.

It is an arithmetic number, because the mean of its divisors is an integer number (5615631279).

Almost surely, 2^11231262557 is an apocalyptic number.

It is an amenable number.

11231262557 is a deficient number, since it is larger than the sum of its proper divisors (1).

11231262557 is an equidigital number, since it uses as much as digits as its factorization.

11231262557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

Adding to 11231262557 its reverse (75526213211), we get a palindrome (86757475768).

The spelling of 11231262557 in words is "eleven billion, two hundred thirty-one million, two hundred sixty-two thousand, five hundred fifty-seven".