1131098431 has 2 divisors, whose sum is σ = 1131098432. Its totient is φ = 1131098430.

The previous prime is 1131098413. The next prime is 1131098467. The reversal of 1131098431 is 1348901311.

Together with previous prime (1131098413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1348901311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131098431 - 2²³ = 1122709823 is a prime.

It is a super-2 number, since 2×1131098431² = 2558767321221323522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1131098393 and 1131098402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131098471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565549215 + 565549216.

It is an arithmetic number, because the mean of its divisors is an integer number (565549216).

Almost surely, 2^1131098431 is an apocalyptic number.

1131098431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131098431 is an equidigital number, since it uses as much as digits as its factorization.

1131098431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1131098431 is about 33631.8068351969. The cubic root of 1131098431 is about 1041.9178218870.

Adding to 1131098431 its reverse (1348901311), we get a palindrome (2479999742).

The spelling of 1131098431 in words is "one billion, one hundred thirty-one million, ninety-eight thousand, four hundred thirty-one".