1131030231 has 32 divisors (see below), whose sum is σ = 1563494400. Its totient is φ = 726891264.

The previous prime is 1131030227. The next prime is 1131030239. The reversal of 1131030231 is 1320301311.

It is not a de Polignac number, because 1131030231 - 2² = 1131030227 is a prime.

It is a super-2 number, since 2×1131030231² = 2558458766871826722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1131030231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131030239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4854091 + ... + 4854323.

It is an arithmetic number, because the mean of its divisors is an integer number (48859200).

Almost surely, 2^1131030231 is an apocalyptic number.

1131030231 is a deficient number, since it is larger than the sum of its proper divisors (432464169).

1131030231 is a wasteful number, since it uses less digits than its factorization.

1131030231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1131030231 is about 33630.7928987706. The cubic root of 1131030231 is about 1041.8968805254.

Adding to 1131030231 its reverse (1320301311), we get a palindrome (2451331542).

The spelling of 1131030231 in words is "one billion, one hundred thirty-one million, thirty thousand, two hundred thirty-one".