131313447 has 16 divisors (see below), whose sum is σ = 199284960. Its totient is φ = 85406400.

The previous prime is 131313437. The next prime is 131313449. The reversal of 131313447 is 744313131.

131313447 is a `hidden beast` number, since 1 + 313 + 1 + 344 + 7 = 666.

It is not a de Polignac number, because 131313447 - 2⁴ = 131313431 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 131313447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131313449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58204 + ... + 60417.

It is an arithmetic number, because the mean of its divisors is an integer number (12455310).

Almost surely, 2^131313447 is an apocalyptic number.

131313447 is a deficient number, since it is larger than the sum of its proper divisors (67971513).

131313447 is a wasteful number, since it uses less digits than its factorization.

131313447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118671 (or 118665 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 131313447 is about 11459.2079569227. The cubic root of 131313447 is about 508.2800538503.

Adding to 131313447 its reverse (744313131), we get a palindrome (875626578).

The spelling of 131313447 in words is "one hundred thirty-one million, three hundred thirteen thousand, four hundred forty-seven".