131563605 has 8 divisors (see below), whose sum is σ = 210501792. Its totient is φ = 70167248.

The previous prime is 131563591. The next prime is 131563613. The reversal of 131563605 is 506365131.

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 131563605 - 2⁴ = 131563589 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4385439 + ... + 4385468.

It is an arithmetic number, because the mean of its divisors is an integer number (26312724).

Almost surely, 2^131563605 is an apocalyptic number.

131563605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131563605 is a deficient number, since it is larger than the sum of its proper divisors (78938187).

131563605 is an equidigital number, since it uses as much as digits as its factorization.

131563605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8770915.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 131563605 is about 11470.1179156973. The cubic root of 131563605 is about 508.6026145314.

It can be divided in two parts, 13156 and 3605, that added together give a palindrome (16761).

The spelling of 131563605 in words is "one hundred thirty-one million, five hundred sixty-three thousand, six hundred five".