1131340231 has 12 divisors (see below), whose sum is σ = 1328860848. Its totient is φ = 943503552.

The previous prime is 1131340219. The next prime is 1131340267. The reversal of 1131340231 is 1320431311.

It is not a de Polignac number, because 1131340231 - 2⁹ = 1131339719 is a prime.

It is a super-2 number, since 2×1131340231² = 2559861436558266722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1131340199 and 1131340208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131340201) 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 in 11 ways as a sum of consecutive naturals, for example, 49446 + ... + 68611.

It is an arithmetic number, because the mean of its divisors is an integer number (110738404).

Almost surely, 2^1131340231 is an apocalyptic number.

1131340231 is a deficient number, since it is larger than the sum of its proper divisors (197520617).

1131340231 is an equidigital number, since it uses as much as digits as its factorization.

1131340231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118138 (or 118101 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1131340231 is about 33635.4014544200. The cubic root of 1131340231 is about 1041.9920617504.

Adding to 1131340231 its reverse (1320431311), we get a palindrome (2451771542).

The spelling of 1131340231 in words is "one billion, one hundred thirty-one million, three hundred forty thousand, two hundred thirty-one".