131775444 has 48 divisors (see below), whose sum is σ = 342316800. Its totient is φ = 43838208.

The previous prime is 131775443. The next prime is 131775461. The reversal of 131775444 is 444577131.

131775444 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 131775399 and 131775408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131775443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76804 + ... + 78500.

It is an arithmetic number, because the mean of its divisors is an integer number (7131600).

Almost surely, 2^131775444 is an apocalyptic number.

It is an amenable number.

131775444 is an abundant number, since it is smaller than the sum of its proper divisors (210541356).

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

131775444 is a wasteful number, since it uses less digits than its factorization.

131775444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429 (or 2421 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 131775444 is about 11479.3485877902. The cubic root of 131775444 is about 508.8754460478.

The spelling of 131775444 in words is "one hundred thirty-one million, seven hundred seventy-five thousand, four hundred forty-four".