1131320331 has 16 divisors (see below), whose sum is σ = 1682005920. Its totient is φ = 751524480.

The previous prime is 1131320329. The next prime is 1131320387. The reversal of 1131320331 is 1330231311.

It is a happy number.

1131320331 is a `hidden beast` number, since 1 + 1 + 313 + 20 + 331 = 666.

It is not a de Polignac number, because 1131320331 - 2¹ = 1131320329 is a prime.

It is a super-2 number, since 2×1131320331² = 2559771382667899122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1131320321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66970 + ... + 82143.

It is an arithmetic number, because the mean of its divisors is an integer number (105125370).

Almost surely, 2^1131320331 is an apocalyptic number.

1131320331 is a deficient number, since it is larger than the sum of its proper divisors (550685589).

1131320331 is a wasteful number, since it uses less digits than its factorization.

1131320331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149403 (or 149397 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1131320331 is about 33635.1056338463. The cubic root of 1131320331 is about 1041.9859522521.

Adding to 1131320331 its reverse (1330231311), we get a palindrome (2461551642).

The spelling of 1131320331 in words is "one billion, one hundred thirty-one million, three hundred twenty thousand, three hundred thirty-one".