1131030331 has 4 divisors (see below), whose sum is σ = 1142011312. Its totient is φ = 1120049352.

The previous prime is 1131030311. The next prime is 1131030353. The reversal of 1131030331 is 1330301311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131030331 - 2⁹ = 1131029819 is a prime.

It is a super-2 number, since 2×1131030331² = 2558459219283939122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131030311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5490336 + ... + 5490541.

It is an arithmetic number, because the mean of its divisors is an integer number (285502828).

Almost surely, 2^1131030331 is an apocalyptic number.

1131030331 is a deficient number, since it is larger than the sum of its proper divisors (10980981).

1131030331 is a wasteful number, since it uses less digits than its factorization.

1131030331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10980980.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 1131030331 is about 33630.7943855033. The cubic root of 1131030331 is about 1041.8969112318.

Adding to 1131030331 its reverse (1330301311), we get a palindrome (2461331642).

The spelling of 1131030331 in words is "one billion, one hundred thirty-one million, thirty thousand, three hundred thirty-one".