1131338643 has 16 divisors (see below), whose sum is σ = 1545519360. Its totient is φ = 735737184.

The previous prime is 1131338623. The next prime is 1131338647. The reversal of 1131338643 is 3468331311.

It is not a de Polignac number, because 1131338643 - 2⁸ = 1131338387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131338647) 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, 103005 + ... + 113457.

It is an arithmetic number, because the mean of its divisors is an integer number (96594960).

Almost surely, 2^1131338643 is an apocalyptic number.

1131338643 is a deficient number, since it is larger than the sum of its proper divisors (414180717).

1131338643 is a wasteful number, since it uses less digits than its factorization.

1131338643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11338.

The product of its digits is 15552, while the sum is 33.

The square root of 1131338643 is about 33635.3778483311. The cubic root of 1131338643 is about 1041.9915742212.

Adding to 1131338643 its reverse (3468331311), we get a palindrome (4599669954).

The spelling of 1131338643 in words is "one billion, one hundred thirty-one million, three hundred thirty-eight thousand, six hundred forty-three".