131851216 has 20 divisors (see below), whose sum is σ = 291956512. Its totient is φ = 56507616.

The previous prime is 131851211. The next prime is 131851217. The reversal of 131851216 is 612158131.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131851211) 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 3 ways as a sum of consecutive naturals, for example, 588510 + ... + 588733.

Almost surely, 2^131851216 is an apocalyptic number.

131851216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

131851216 is an abundant number, since it is smaller than the sum of its proper divisors (160105296).

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

131851216 is a wasteful number, since it uses less digits than its factorization.

131851216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177258 (or 1177252 counting only the distinct ones).

The product of its digits is 1440, while the sum is 28.

The square root of 131851216 is about 11482.6484749817. The cubic root of 131851216 is about 508.9729632609.

The spelling of 131851216 in words is "one hundred thirty-one million, eight hundred fifty-one thousand, two hundred sixteen".