55800285 has 16 divisors (see below), whose sum is σ = 89800704. Its totient is φ = 29586752.

The previous prime is 55800271. The next prime is 55800289. The reversal of 55800285 is 58200855.

It is a cyclic number.

It is not a de Polignac number, because 55800285 - 2¹⁸ = 55538141 is a prime.

It is a super-2 number, since 2×55800285² = 6227343612162450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55800289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8157 + ... + 13346.

It is an arithmetic number, because the mean of its divisors is an integer number (5612544).

Almost surely, 2^55800285 is an apocalyptic number.

It is an amenable number.

55800285 is a deficient number, since it is larger than the sum of its proper divisors (34000419).

55800285 is a wasteful number, since it uses less digits than its factorization.

55800285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21684.

The product of its (nonzero) digits is 16000, while the sum is 33.

The square root of 55800285 is about 7469.9588352279. The cubic root of 55800285 is about 382.1308840357.

The spelling of 55800285 in words is "fifty-five million, eight hundred thousand, two hundred eighty-five".