131745546 has 48 divisors (see below), whose sum is σ = 309640968. Its totient is φ = 40320000.

The previous prime is 131745533. The next prime is 131745547. The reversal of 131745546 is 645547131.

131745546 is a `hidden beast` number, since 1 + 31 + 74 + 554 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 85655025 + 46090521 = 9255^2 + 6789^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131745546.

It is not an unprimeable number, because it can be changed into a prime (131745547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7296 + ... + 17796.

Almost surely, 2^131745546 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131745546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154820484).

131745546 is an abundant number, since it is smaller than the sum of its proper divisors (177895422).

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

131745546 is a wasteful number, since it uses less digits than its factorization.

131745546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10567 (or 10564 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 131745546 is about 11478.0462623218. The cubic root of 131745546 is about 508.8369575697.

The spelling of 131745546 in words is "one hundred thirty-one million, seven hundred forty-five thousand, five hundred forty-six".