131591567 has 8 divisors (see below), whose sum is σ = 134977920. Its totient is φ = 128220120.

The previous prime is 131591563. The next prime is 131591569. The reversal of 131591567 is 765195131.

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 131591567 - 2² = 131591563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131591567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131591563) 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, 15392 + ... + 22362.

It is an arithmetic number, because the mean of its divisors is an integer number (16872240).

Almost surely, 2^131591567 is an apocalyptic number.

131591567 is a deficient number, since it is larger than the sum of its proper divisors (3386353).

131591567 is an equidigital number, since it uses as much as digits as its factorization.

131591567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7453.

The product of its digits is 28350, while the sum is 38.

The square root of 131591567 is about 11471.3367573269. The cubic root of 131591567 is about 508.6386440977.

The spelling of 131591567 in words is "one hundred thirty-one million, five hundred ninety-one thousand, five hundred sixty-seven".