1131142231 has 8 divisors (see below), whose sum is σ = 1181489760. Its totient is φ = 1080892032.

The previous prime is 1131142211. The next prime is 1131142237. The reversal of 1131142231 is 1322411311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131142231 - 2¹⁷ = 1131011159 is a prime.

It is a super-2 number, since 2×1131142231² = 2558965493503314722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1131142199 and 1131142208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131142237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46 + ... + 47563.

It is an arithmetic number, because the mean of its divisors is an integer number (147686220).

Almost surely, 2^1131142231 is an apocalyptic number.

1131142231 is a deficient number, since it is larger than the sum of its proper divisors (50347529).

1131142231 is a wasteful number, since it uses less digits than its factorization.

1131142231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48665.

The product of its digits is 144, while the sum is 19.

The square root of 1131142231 is about 33632.4579981898. The cubic root of 1131142231 is about 1041.9312705873.

Adding to 1131142231 its reverse (1322411311), we get a palindrome (2453553542).

The spelling of 1131142231 in words is "one billion, one hundred thirty-one million, one hundred forty-two thousand, two hundred thirty-one".