131216859 has 12 divisors (see below), whose sum is σ = 189991152. Its totient is φ = 87267600.

The previous prime is 131216857. The next prime is 131216861. The reversal of 131216859 is 958612131.

It is an interprime number because it is at equal distance from previous prime (131216857) and next prime (131216861).

It is not a de Polignac number, because 131216859 - 2¹ = 131216857 is a prime.

It is a super-3 number, since 3×131216859³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (131216857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13527 + ... + 21104.

It is an arithmetic number, because the mean of its divisors is an integer number (15832596).

Almost surely, 2^131216859 is an apocalyptic number.

131216859 is a deficient number, since it is larger than the sum of its proper divisors (58774293).

131216859 is a wasteful number, since it uses less digits than its factorization.

131216859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35058 (or 35055 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 131216859 is about 11454.9927542535. The cubic root of 131216859 is about 508.1554009761.

The spelling of 131216859 in words is "one hundred thirty-one million, two hundred sixteen thousand, eight hundred fifty-nine".