1131322331 has 4 divisors (see below), whose sum is σ = 1131412200. Its totient is φ = 1131232464.

The previous prime is 1131322327. The next prime is 1131322337. The reversal of 1131322331 is 1332231311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1332231311 = 167 ⋅7977433.

It is a cyclic number.

It is not a de Polignac number, because 1131322331 - 2² = 1131322327 is a prime.

It is a super-2 number, since 2×1131322331² = 2559780433238547122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131322337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22226 + ... + 52503.

It is an arithmetic number, because the mean of its divisors is an integer number (282853050).

Almost surely, 2^1131322331 is an apocalyptic number.

1131322331 is a deficient number, since it is larger than the sum of its proper divisors (89869).

1131322331 is an equidigital number, since it uses as much as digits as its factorization.

1131322331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89868.

The product of its digits is 324, while the sum is 20.

The square root of 1131322331 is about 33635.1353646748. The cubic root of 1131322331 is about 1041.9865662753.

Adding to 1131322331 its reverse (1332231311), we get a palindrome (2463553642).

The spelling of 1131322331 in words is "one billion, one hundred thirty-one million, three hundred twenty-two thousand, three hundred thirty-one".