285122550 has 48 divisors (see below), whose sum is σ = 744327360. Its totient is φ = 72030240.

The previous prime is 285122543. The next prime is 285122561. The reversal of 285122550 is 55221582.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47172 + ... + 52871.

It is an arithmetic number, because the mean of its divisors is an integer number (15506820).

Almost surely, 2^285122550 is an apocalyptic number.

285122550 is an abundant number, since it is smaller than the sum of its proper divisors (459204810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285122550 is a wasteful number, since it uses less digits than its factorization.

285122550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100077 (or 100072 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 285122550 is about 16885.5722437826. The cubic root of 285122550 is about 658.1787484433.

The spelling of 285122550 in words is "two hundred eighty-five million, one hundred twenty-two thousand, five hundred fifty".