1131411231 has 12 divisors (see below), whose sum is σ = 1634641008. Its totient is φ = 754098624.

The previous prime is 1131411187. The next prime is 1131411233. The reversal of 1131411231 is 1321141311.

It is a happy number.

It is not a de Polignac number, because 1131411231 - 2⁶ = 1131411167 is a prime.

It is a super-2 number, since 2×1131411231² = 2560182747265870722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131411233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35086 + ... + 59108.

It is an arithmetic number, because the mean of its divisors is an integer number (136220084).

Almost surely, 2^1131411231 is an apocalyptic number.

1131411231 is a deficient number, since it is larger than the sum of its proper divisors (503229777).

1131411231 is a wasteful number, since it uses less digits than its factorization.

1131411231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29262 (or 29259 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1131411231 is about 33636.4568734580. The cubic root of 1131411231 is about 1042.0138588741.

Adding to 1131411231 its reverse (1321141311), we get a palindrome (2452552542).

It can be divided in two parts, 113 and 1411231, that added together give a square (1411344 = 1188²).

The spelling of 1131411231 in words is "one billion, one hundred thirty-one million, four hundred eleven thousand, two hundred thirty-one".