11131535231 has 2 divisors, whose sum is σ = 11131535232. Its totient is φ = 11131535230.

The previous prime is 11131535209. The next prime is 11131535249. The reversal of 11131535231 is 13253513111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11131535231 - 2¹⁰ = 11131534207 is a prime.

It is a super-2 number, since 2×11131535231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11131535231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11131535291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565767615 + 5565767616.

It is an arithmetic number, because the mean of its divisors is an integer number (5565767616).

Almost surely, 2^11131535231 is an apocalyptic number.

11131535231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131535231 is an equidigital number, since it uses as much as digits as its factorization.

11131535231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 26.

The spelling of 11131535231 in words is "eleven billion, one hundred thirty-one million, five hundred thirty-five thousand, two hundred thirty-one".