11431031142 has 32 divisors (see below), whose sum is σ = 25111653120. Its totient is φ = 3452850720.

The previous prime is 11431031099. The next prime is 11431031173. The reversal of 11431031142 is 24113013411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2177209 + ... + 2182452.

It is an arithmetic number, because the mean of its divisors is an integer number (784739160).

Almost surely, 2^11431031142 is an apocalyptic number.

11431031142 is an abundant number, since it is smaller than the sum of its proper divisors (13680621978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11431031142 is a wasteful number, since it uses less digits than its factorization.

11431031142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4359708.

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

Adding to 11431031142 its reverse (24113013411), we get a palindrome (35544044553).

The spelling of 11431031142 in words is "eleven billion, four hundred thirty-one million, thirty-one thousand, one hundred forty-two".