131283216 has 30 divisors (see below), whose sum is σ = 367411070. Its totient is φ = 43761024.

The previous prime is 131283211. The next prime is 131283223. The reversal of 131283216 is 612382131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 108243216 + 23040000 = 10404^2 + 4800^2 .

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 131283216.

It is not an unprimeable number, because it can be changed into a prime (131283211) 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 5 ways as a sum of consecutive naturals, for example, 455701 + ... + 455988.

Almost surely, 2^131283216 is an apocalyptic number.

131283216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

131283216 is an abundant number, since it is smaller than the sum of its proper divisors (236127854).

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

131283216 is a wasteful number, since it uses less digits than its factorization.

131283216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911703 (or 911694 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 131283216 is about 11457.8888107714. Note that the first 4 decimals coincide. The cubic root of 131283216 is about 508.2410454218.

The spelling of 131283216 in words is "one hundred thirty-one million, two hundred eighty-three thousand, two hundred sixteen".