131345784 has 48 divisors (see below), whose sum is σ = 374454600. Its totient is φ = 41477184.

The previous prime is 131345783. The next prime is 131345789. The reversal of 131345784 is 487543131.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131345783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46639 + ... + 49374.

Almost surely, 2^131345784 is an apocalyptic number.

It is an amenable number.

131345784 is an abundant number, since it is smaller than the sum of its proper divisors (243108816).

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

131345784 is a wasteful number, since it uses less digits than its factorization.

131345784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96044 (or 96037 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 131345784 is about 11460.6188314593. The cubic root of 131345784 is about 508.3217731194.

The spelling of 131345784 in words is "one hundred thirty-one million, three hundred forty-five thousand, seven hundred eighty-four".