131840216 has 8 divisors (see below), whose sum is σ = 247200420. Its totient is φ = 65920104.

The previous prime is 131840197. The next prime is 131840227. The reversal of 131840216 is 612048131.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 8240006 + ... + 8240021.

Almost surely, 2^131840216 is an apocalyptic number.

It is an amenable number.

131840216 is a deficient number, since it is larger than the sum of its proper divisors (115360204).

131840216 is a wasteful number, since it uses less digits than its factorization.

131840216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16480033 (or 16480029 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 131840216 is about 11482.1694814177. The cubic root of 131840216 is about 508.9588087756.

Adding to 131840216 its reverse (612048131), we get a palindrome (743888347).

The spelling of 131840216 in words is "one hundred thirty-one million, eight hundred forty thousand, two hundred sixteen".