131321244 has 12 divisors (see below), whose sum is σ = 306416264. Its totient is φ = 43773744.

The previous prime is 131321231. The next prime is 131321249. The reversal of 131321244 is 442123131.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 131321244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131321249) 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 3 ways as a sum of consecutive naturals, for example, 5471707 + ... + 5471730.

Almost surely, 2^131321244 is an apocalyptic number.

It is an amenable number.

131321244 is an abundant number, since it is smaller than the sum of its proper divisors (175095020).

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

131321244 is a wasteful number, since it uses less digits than its factorization.

131321244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10943444 (or 10943442 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 131321244 is about 11459.5481586317. The cubic root of 131321244 is about 508.2901137013.

Adding to 131321244 its reverse (442123131), we get a palindrome (573444375).

The spelling of 131321244 in words is "one hundred thirty-one million, three hundred twenty-one thousand, two hundred forty-four".