287283161 has 12 divisors (see below), whose sum is σ = 321739236. Its totient is φ = 256233120.

The previous prime is 287283151. The next prime is 287283197. The reversal of 287283161 is 161382782.

It can be written as a sum of positive squares in 2 ways, for example, as 146410000 + 140873161 = 12100^2 + 11869^2 .

It is not a de Polignac number, because 287283161 - 2¹⁰ = 287282137 is a prime.

It is a super-2 number, since 2×287283161² = 165063229188303842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287283151) 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 11 ways as a sum of consecutive naturals, for example, 15986 + ... + 28811.

It is an arithmetic number, because the mean of its divisors is an integer number (26811603).

Almost surely, 2^287283161 is an apocalyptic number.

It is an amenable number.

287283161 is a deficient number, since it is larger than the sum of its proper divisors (34456075).

287283161 is a wasteful number, since it uses less digits than its factorization.

287283161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44872 (or 44861 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The square root of 287283161 is about 16949.4295184233. The cubic root of 287283161 is about 659.8370894210.

The spelling of 287283161 in words is "two hundred eighty-seven million, two hundred eighty-three thousand, one hundred sixty-one".