1131323013 has 12 divisors (see below), whose sum is σ = 1640647008. Its totient is φ = 751209000.

The previous prime is 1131322999. The next prime is 1131323029. The reversal of 1131323013 is 3103231311.

It is a happy number.

It is not a de Polignac number, because 1131323013 - 2⁵ = 1131322981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131323033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248145 + ... + 252662.

It is an arithmetic number, because the mean of its divisors is an integer number (136720584).

Almost surely, 2^1131323013 is an apocalyptic number.

It is an amenable number.

1131323013 is a deficient number, since it is larger than the sum of its proper divisors (509323995).

1131323013 is a wasteful number, since it uses less digits than its factorization.

1131323013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501064 (or 501061 counting only the distinct ones).

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

The square root of 1131323013 is about 33635.1455028814. The cubic root of 1131323013 is about 1041.9867756570.

Adding to 1131323013 its reverse (3103231311), we get a palindrome (4234554324).

The spelling of 1131323013 in words is "one billion, one hundred thirty-one million, three hundred twenty-three thousand, thirteen".