131006217 has 8 divisors (see below), whose sum is σ = 180309760. Its totient is φ = 84520080.

The previous prime is 131006209. The next prime is 131006231. The reversal of 131006217 is 712600131.

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

It is not a de Polignac number, because 131006217 - 2³ = 131006209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131006193 and 131006202.

It is not an unprimeable number, because it can be changed into a prime (131006257) 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, 704242 + ... + 704427.

It is an arithmetic number, because the mean of its divisors is an integer number (22538720).

Almost surely, 2^131006217 is an apocalyptic number.

It is an amenable number.

131006217 is a deficient number, since it is larger than the sum of its proper divisors (49303543).

131006217 is a wasteful number, since it uses less digits than its factorization.

131006217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408703.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 131006217 is about 11445.7947299434. The cubic root of 131006217 is about 507.8833419375.

Adding to 131006217 its reverse (712600131), we get a palindrome (843606348).

The spelling of 131006217 in words is "one hundred thirty-one million, six thousand, two hundred seventeen".