131571216 has 100 divisors (see below), whose sum is σ = 435236032. Its totient is φ = 37589184.

The previous prime is 131571199. The next prime is 131571217. The reversal of 131571216 is 612175131.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 131571216.

It is not an unprimeable number, because it can be changed into a prime (131571217) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1821 + ... + 16323.

Almost surely, 2^131571216 is an apocalyptic number.

131571216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131571216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217618016).

131571216 is an abundant number, since it is smaller than the sum of its proper divisors (303664816).

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

131571216 is a wasteful number, since it uses less digits than its factorization.

131571216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14530 (or 14515 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 131571216 is about 11470.4496860411. The cubic root of 131571216 is about 508.6124219546.

The spelling of 131571216 in words is "one hundred thirty-one million, five hundred seventy-one thousand, two hundred sixteen".