285421631209 has 8 divisors (see below), whose sum is σ = 335320517952. Its totient is φ = 239514655440.

The previous prime is 285421631149. The next prime is 285421631221. The reversal of 285421631209 is 902136124582.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285421631209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285421631279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 997977589 + ... + 997977874.

It is an arithmetic number, because the mean of its divisors is an integer number (41915064744).

Almost surely, 2^285421631209 is an apocalyptic number.

It is an amenable number.

285421631209 is a deficient number, since it is larger than the sum of its proper divisors (49898886743).

285421631209 is a wasteful number, since it uses less digits than its factorization.

285421631209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995955487.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 285421631209 in words is "two hundred eighty-five billion, four hundred twenty-one million, six hundred thirty-one thousand, two hundred nine".