10115431091 has 2 divisors, whose sum is σ = 10115431092. Its totient is φ = 10115431090.

The previous prime is 10115431087. The next prime is 10115431093. The reversal of 10115431091 is 19013451101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10115431091 - 2² = 10115431087 is a prime.

Together with 10115431093, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10115431091.

It is not a weakly prime, because it can be changed into another prime (10115431093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5057715545 + 5057715546.

It is an arithmetic number, because the mean of its divisors is an integer number (5057715546).

Almost surely, 2^10115431091 is an apocalyptic number.

10115431091 is a deficient number, since it is larger than the sum of its proper divisors (1).

10115431091 is an equidigital number, since it uses as much as digits as its factorization.

10115431091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 26.

Adding to 10115431091 its reverse (19013451101), we get a palindrome (29128882192).

The spelling of 10115431091 in words is "ten billion, one hundred fifteen million, four hundred thirty-one thousand, ninety-one".