131321608 has 32 divisors (see below), whose sum is σ = 272633760. Its totient is φ = 58798080.

The previous prime is 131321581. The next prime is 131321627. The reversal of 131321608 is 806123131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5241 + ... + 17032.

It is an arithmetic number, because the mean of its divisors is an integer number (8519805).

Almost surely, 2^131321608 is an apocalyptic number.

It is an amenable number.

131321608 is an abundant number, since it is smaller than the sum of its proper divisors (141312152).

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

131321608 is a wasteful number, since it uses less digits than its factorization.

131321608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22357 (or 22353 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 131321608 is about 11459.5640405733. The cubic root of 131321608 is about 508.2905833319.

Adding to 131321608 its reverse (806123131), we get a palindrome (937444739).

The spelling of 131321608 in words is "one hundred thirty-one million, three hundred twenty-one thousand, six hundred eight".