131971648 has 14 divisors (see below), whose sum is σ = 261881366. Its totient is φ = 65985792.

The previous prime is 131971639. The next prime is 131971649. The reversal of 131971648 is 846179131.

131971648 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 97772544 + 34199104 = 9888^2 + 5848^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131971648.

It is not an unprimeable number, because it can be changed into a prime (131971649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030965 + ... + 1031092.

Almost surely, 2^131971648 is an apocalyptic number.

It is an amenable number.

131971648 is a deficient number, since it is larger than the sum of its proper divisors (129909718).

131971648 is an equidigital number, since it uses as much as digits as its factorization.

131971648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062069 (or 2062059 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 131971648 is about 11487.8913643889. The cubic root of 131971648 is about 509.1278802464.

The spelling of 131971648 in words is "one hundred thirty-one million, nine hundred seventy-one thousand, six hundred forty-eight".