131565243 has 16 divisors (see below), whose sum is σ = 177292800. Its totient is φ = 86779200.

The previous prime is 131565211. The next prime is 131565277. The reversal of 131565243 is 342565131.

It is not a de Polignac number, because 131565243 - 2⁵ = 131565211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131565243.

It is not an unprimeable number, because it can be changed into a prime (131565283) 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, 162223 + ... + 163031.

It is an arithmetic number, because the mean of its divisors is an integer number (11080800).

Almost surely, 2^131565243 is an apocalyptic number.

131565243 is a deficient number, since it is larger than the sum of its proper divisors (45727557).

131565243 is a wasteful number, since it uses less digits than its factorization.

131565243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322.

The product of its digits is 10800, while the sum is 30.

The square root of 131565243 is about 11470.1893184027. The cubic root of 131565243 is about 508.6047252662.

The spelling of 131565243 in words is "one hundred thirty-one million, five hundred sixty-five thousand, two hundred forty-three".