1311431032 has 32 divisors (see below), whose sum is σ = 2472865200. Its totient is φ = 652013824.

The previous prime is 1311431029. The next prime is 1311431039. The reversal of 1311431032 is 2301341131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311431039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1919763 + ... + 1920445.

Almost surely, 2^1311431032 is an apocalyptic number.

It is an amenable number.

1311431032 is a deficient number, since it is larger than the sum of its proper divisors (1161434168).

1311431032 is a wasteful number, since it uses less digits than its factorization.

1311431032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695 (or 1691 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1311431032 is about 36213.6857002984. The cubic root of 1311431032 is about 1094.5824619649.

Adding to 1311431032 its reverse (2301341131), we get a palindrome (3612772163).

The spelling of 1311431032 in words is "one billion, three hundred eleven million, four hundred thirty-one thousand, thirty-two".