285055563 has 8 divisors (see below), whose sum is σ = 409310608. Its totient is φ = 175418784.

The previous prime is 285055553. The next prime is 285055567. The reversal of 285055563 is 365550582.

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

It is not a de Polignac number, because 285055563 - 2²¹ = 282958411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 7309117 = 285055563 / (2 + 8 + 5 + 0 + 5 + 5 + 5 + 6 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285055567) 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, 3654520 + ... + 3654597.

It is an arithmetic number, because the mean of its divisors is an integer number (51163826).

Almost surely, 2^285055563 is an apocalyptic number.

285055563 is a deficient number, since it is larger than the sum of its proper divisors (124255045).

285055563 is a wasteful number, since it uses less digits than its factorization.

285055563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7309133.

The product of its (nonzero) digits is 180000, while the sum is 39.

The square root of 285055563 is about 16883.5885699694. The cubic root of 285055563 is about 658.1271999973.

The spelling of 285055563 in words is "two hundred eighty-five million, fifty-five thousand, five hundred sixty-three".