131228312 has 32 divisors (see below), whose sum is σ = 250311600. Its totient is φ = 64487424.

The previous prime is 131228311. The next prime is 131228329. The reversal of 131228312 is 213822131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131228311) 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 7 ways as a sum of consecutive naturals, for example, 170264 + ... + 171032.

Almost surely, 2^131228312 is an apocalyptic number.

It is an amenable number.

131228312 is a deficient number, since it is larger than the sum of its proper divisors (119083288).

131228312 is a wasteful number, since it uses less digits than its factorization.

131228312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115 (or 1111 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 131228312 is about 11455.4926563636. The cubic root of 131228312 is about 508.1701849871.

The spelling of 131228312 in words is "one hundred thirty-one million, two hundred twenty-eight thousand, three hundred twelve".