131210017 has 4 divisors (see below), whose sum is σ = 131271316. Its totient is φ = 131148720.

The previous prime is 131209997. The next prime is 131210021. The reversal of 131210017 is 710012131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 710012131 = 191 ⋅3717341.

It can be written as a sum of positive squares in 2 ways, for example, as 55711296 + 75498721 = 7464^2 + 8689^2 .

It is a cyclic number.

It is not a de Polignac number, because 131210017 - 2⁷ = 131209889 is a prime.

It is a super-2 number, since 2×131210017² = 34432137122280578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131210087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27318 + ... + 31759.

It is an arithmetic number, because the mean of its divisors is an integer number (32817829).

Almost surely, 2^131210017 is an apocalyptic number.

It is an amenable number.

131210017 is a deficient number, since it is larger than the sum of its proper divisors (61299).

131210017 is an equidigital number, since it uses as much as digits as its factorization.

131210017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61298.

The product of its (nonzero) digits is 42, while the sum is 16.

The square root of 131210017 is about 11454.6941032923. The cubic root of 131210017 is about 508.1465686260.

Adding to 131210017 its reverse (710012131), we get a palindrome (841222148).

The spelling of 131210017 in words is "one hundred thirty-one million, two hundred ten thousand, seventeen".