11581357 has 2 divisors, whose sum is σ = 11581358. Its totient is φ = 11581356.

The previous prime is 11581337. The next prime is 11581363. The reversal of 11581357 is 75318511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11195716 + 385641 = 3346^2 + 621^2 .

It is an emirp because it is prime and its reverse (75318511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11581357 is a prime.

It is a super-2 number, since 2×11581357² = 268255659922898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11581337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5790678 + 5790679.

It is an arithmetic number, because the mean of its divisors is an integer number (5790679).

Almost surely, 2^11581357 is an apocalyptic number.

It is an amenable number.

11581357 is a deficient number, since it is larger than the sum of its proper divisors (1).

11581357 is an equidigital number, since it uses as much as digits as its factorization.

11581357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 31.

The square root of 11581357 is about 3403.1392860123. The cubic root of 11581357 is about 226.2489034673.

Adding to 11581357 its reverse (75318511), we get a palindrome (86899868).

The spelling of 11581357 in words is "eleven million, five hundred eighty-one thousand, three hundred fifty-seven".