131216670 has 72 divisors (see below), whose sum is σ = 369468216. Its totient is φ = 32295744.

The previous prime is 131216639. The next prime is 131216699. The reversal of 131216670 is 76612131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10897 + ... + 19523.

It is an arithmetic number, because the mean of its divisors is an integer number (5131503).

Almost surely, 2^131216670 is an apocalyptic number.

131216670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 131216670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184734108).

131216670 is an abundant number, since it is smaller than the sum of its proper divisors (238251546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131216670 is a wasteful number, since it uses less digits than its factorization.

131216670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8666 (or 8650 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 131216670 is about 11454.9845045727. The cubic root of 131216670 is about 508.1551569998.

It can be divided in two parts, 13121 and 6670, that added together give a palindrome (19791).

The spelling of 131216670 in words is "one hundred thirty-one million, two hundred sixteen thousand, six hundred seventy".