131145344 has 64 divisors (see below), whose sum is σ = 301838400. Its totient is φ = 56094720.

The previous prime is 131145319. The next prime is 131145349. The reversal of 131145344 is 443541131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (131145349) 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, 21197 + ... + 26675.

It is an arithmetic number, because the mean of its divisors is an integer number (4716225).

Almost surely, 2^131145344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131145344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150919200).

131145344 is an abundant number, since it is smaller than the sum of its proper divisors (170693056).

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

131145344 is a wasteful number, since it uses less digits than its factorization.

131145344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521 (or 5509 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 131145344 is about 11451.8707642027. The cubic root of 131145344 is about 508.0630669629.

Adding to 131145344 its reverse (443541131), we get a palindrome (574686475).

The spelling of 131145344 in words is "one hundred thirty-one million, one hundred forty-five thousand, three hundred forty-four".