131552609 has 8 divisors (see below), whose sum is σ = 134840640. Its totient is φ = 128275056.

The previous prime is 131552581. The next prime is 131552611. The reversal of 131552609 is 906255131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131552609 - 2²⁴ = 114775393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131552669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26852 + ... + 31370.

It is an arithmetic number, because the mean of its divisors is an integer number (16855080).

Almost surely, 2^131552609 is an apocalyptic number.

It is an amenable number.

131552609 is a deficient number, since it is larger than the sum of its proper divisors (3288031).

131552609 is an equidigital number, since it uses as much as digits as its factorization.

131552609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5239.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 131552609 is about 11469.6385732071. The cubic root of 131552609 is about 508.5884445787.

The spelling of 131552609 in words is "one hundred thirty-one million, five hundred fifty-two thousand, six hundred nine".