131968188 has 36 divisors (see below), whose sum is σ = 363913368. Its totient is φ = 39990240.

The previous prime is 131968169. The next prime is 131968201. The reversal of 131968188 is 881869131.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166231 + ... + 167022.

Almost surely, 2^131968188 is an apocalyptic number.

131968188 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

131968188 is an abundant number, since it is smaller than the sum of its proper divisors (231945180).

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

131968188 is a wasteful number, since it uses less digits than its factorization.

131968188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333274 (or 333269 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 131968188 is about 11487.7407700557. The cubic root of 131968188 is about 509.1234308112.

The spelling of 131968188 in words is "one hundred thirty-one million, nine hundred sixty-eight thousand, one hundred eighty-eight".