131717825 has 6 divisors (see below), whose sum is σ = 163330134. Its totient is φ = 105374240.

The previous prime is 131717821. The next prime is 131717843. The reversal of 131717825 is 528717131.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 17505856 + 114211969 = 4184^2 + 10687^2 .

It is not a de Polignac number, because 131717825 - 2² = 131717821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131717821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2634332 + ... + 2634381.

It is an arithmetic number, because the mean of its divisors is an integer number (27221689).

Almost surely, 2^131717825 is an apocalyptic number.

It is an amenable number.

131717825 is a deficient number, since it is larger than the sum of its proper divisors (31612309).

131717825 is an equidigital number, since it uses as much as digits as its factorization.

131717825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5268723 (or 5268718 counting only the distinct ones).

The product of its digits is 11760, while the sum is 35.

The square root of 131717825 is about 11476.8386326549. The cubic root of 131717825 is about 508.8012663979.

The spelling of 131717825 in words is "one hundred thirty-one million, seven hundred seventeen thousand, eight hundred twenty-five".