287531242161 has 16 divisors (see below), whose sum is σ = 393759739200. Its totient is φ = 186495732288.

The previous prime is 287531242157. The next prime is 287531242169. The reversal of 287531242161 is 161242135782.

It is not a de Polignac number, because 287531242161 - 2² = 287531242157 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (287531242169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2084235 + ... + 2217903.

It is an arithmetic number, because the mean of its divisors is an integer number (24609983700).

Almost surely, 2^287531242161 is an apocalyptic number.

It is an amenable number.

287531242161 is a deficient number, since it is larger than the sum of its proper divisors (106228497039).

287531242161 is a wasteful number, since it uses less digits than its factorization.

287531242161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153088.

The product of its digits is 161280, while the sum is 42.

The spelling of 287531242161 in words is "two hundred eighty-seven billion, five hundred thirty-one million, two hundred forty-two thousand, one hundred sixty-one".