131545575 has 90 divisors (see below), whose sum is σ = 286100984. Its totient is φ = 56597760.

The previous prime is 131545571. The next prime is 131545577. The reversal of 131545575 is 575545131.

It is a happy number.

131545575 is a `hidden beast` number, since 1 + 31 + 54 + 5 + 575 = 666.

It is not a de Polignac number, because 131545575 - 2² = 131545571 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131545571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 7737967 + ... + 7737983.

Almost surely, 2^131545575 is an apocalyptic number.

131545575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131545575 is an abundant number, since it is smaller than the sum of its proper divisors (154555409).

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

131545575 is an frugal number, since it uses more digits than its factorization.

131545575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 32 counting only the distinct ones).

The product of its digits is 52500, while the sum is 36.

The square root of 131545575 is about 11469.3319334650. The cubic root of 131545575 is about 508.5793798279.

The spelling of 131545575 in words is "one hundred thirty-one million, five hundred forty-five thousand, five hundred seventy-five".