231082587286509 has 32 divisors (see below), whose sum is σ = 357291420678144. Its totient is φ = 130112249117760.

The previous prime is 231082587286493. The next prime is 231082587286547. The reversal of 231082587286509 is 905682785280132.

It is not a de Polignac number, because 231082587286509 - 2⁴ = 231082587286493 is a prime.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 231082587286509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231082587286559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42131899 + ... + 47299704.

It is an arithmetic number, because the mean of its divisors is an integer number (11165356896192).

Almost surely, 2^{231082587286509} is an apocalyptic number.

It is an amenable number.

231082587286509 is a deficient number, since it is larger than the sum of its proper divisors (126208833391635).

231082587286509 is a wasteful number, since it uses less digits than its factorization.

231082587286509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89433417.

The product of its (nonzero) digits is 116121600, while the sum is 66.

The spelling of 231082587286509 in words is "two hundred thirty-one trillion, eighty-two billion, five hundred eighty-seven million, two hundred eighty-six thousand, five hundred nine".