11331331597 has 2 divisors, whose sum is σ = 11331331598. Its totient is φ = 11331331596.

The previous prime is 11331331489. The next prime is 11331331601. The reversal of 11331331597 is 79513313311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8860645161 + 2470686436 = 94131^2 + 49706^2 .

It is a cyclic number.

It is not a de Polignac number, because 11331331597 - 2¹⁵ = 11331298829 is a prime.

It is a super-2 number, since 2×11331331597² (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 (11331335597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665665798 + 5665665799.

It is an arithmetic number, because the mean of its divisors is an integer number (5665665799).

Almost surely, 2^11331331597 is an apocalyptic number.

It is an amenable number.

11331331597 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331331597 is an equidigital number, since it uses as much as digits as its factorization.

11331331597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25515, while the sum is 37.

The spelling of 11331331597 in words is "eleven billion, three hundred thirty-one million, three hundred thirty-one thousand, five hundred ninety-seven".