131311444 has 12 divisors (see below), whose sum is σ = 250685568. Its totient is φ = 59687000.

The previous prime is 131311423. The next prime is 131311457. The reversal of 131311444 is 444113131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1492132 + ... + 1492219.

It is an arithmetic number, because the mean of its divisors is an integer number (20890464).

Almost surely, 2^131311444 is an apocalyptic number.

It is an amenable number.

131311444 is a deficient number, since it is larger than the sum of its proper divisors (119374124).

131311444 is a wasteful number, since it uses less digits than its factorization.

131311444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984366 (or 2984364 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 131311444 is about 11459.1205596241. The cubic root of 131311444 is about 508.2774694739.

Adding to 131311444 its reverse (444113131), we get a palindrome (575424575).

The spelling of 131311444 in words is "one hundred thirty-one million, three hundred eleven thousand, four hundred forty-four".