1131312441 has 32 divisors (see below), whose sum is σ = 1767136000. Its totient is φ = 643507200.

The previous prime is 1131312437. The next prime is 1131312473. The reversal of 1131312441 is 1442131311.

It is not a de Polignac number, because 1131312441 - 2² = 1131312437 is a prime.

It is a super-2 number, since 2×1131312441² = 2559735678322756962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1131312541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233241 + ... + 238041.

It is an arithmetic number, because the mean of its divisors is an integer number (55223000).

Almost surely, 2^1131312441 is an apocalyptic number.

It is an amenable number.

1131312441 is a deficient number, since it is larger than the sum of its proper divisors (635823559).

1131312441 is an equidigital number, since it uses as much as digits as its factorization.

1131312441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5054 (or 5040 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 1131312441 is about 33634.9883454714. The cubic root of 1131312441 is about 1041.9835299236.

Adding to 1131312441 its reverse (1442131311), we get a palindrome (2573443752).

The spelling of 1131312441 in words is "one billion, one hundred thirty-one million, three hundred twelve thousand, four hundred forty-one".