131444340 has 96 divisors (see below), whose sum is σ = 402361344. Its totient is φ = 31918080.

The previous prime is 131444321. The next prime is 131444347. The reversal of 131444340 is 43444131.

It is a super-2 number, since 2×131444340² = 34555229036071200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131444340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131444347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29542 + ... + 33698.

It is an arithmetic number, because the mean of its divisors is an integer number (4191264).

Almost surely, 2^131444340 is an apocalyptic number.

131444340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131444340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201180672).

131444340 is an abundant number, since it is smaller than the sum of its proper divisors (270917004).

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

131444340 is a wasteful number, since it uses less digits than its factorization.

131444340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4217 (or 4215 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 131444340 is about 11464.9177929892. The cubic root of 131444340 is about 508.4488819713.

Adding to 131444340 its reverse (43444131), we get a palindrome (174888471).

It can be divided in two parts, 1314 and 44340, that added together give a palindrome (45654).

The spelling of 131444340 in words is "one hundred thirty-one million, four hundred forty-four thousand, three hundred forty".