287485131 has 8 divisors (see below), whose sum is σ = 389597584. Its totient is φ = 188514720.

The previous prime is 287485097. The next prime is 287485157. The reversal of 287485131 is 131584782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 287485131 - 2⁹ = 287484619 is a prime.

It is a super-2 number, since 2×287485131² = 165295401092174322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 287485131.

It is not an unprimeable number, because it can be changed into a prime (287485171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785296 + ... + 785661.

It is an arithmetic number, because the mean of its divisors is an integer number (48699698).

Almost surely, 2^287485131 is an apocalyptic number.

287485131 is a deficient number, since it is larger than the sum of its proper divisors (102112453).

287485131 is a wasteful number, since it uses less digits than its factorization.

287485131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571021.

The product of its digits is 53760, while the sum is 39.

The square root of 287485131 is about 16955.3864892547. The cubic root of 287485131 is about 659.9916826316.

The spelling of 287485131 in words is "two hundred eighty-seven million, four hundred eighty-five thousand, one hundred thirty-one".