55000863 has 36 divisors (see below), whose sum is σ = 84317688. Its totient is φ = 35866800.

The previous prime is 55000811. The next prime is 55000871. The reversal of 55000863 is 36800055.

It is not a de Polignac number, because 55000863 - 2⁸ = 55000607 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55000163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 544513 + ... + 544613.

It is an arithmetic number, because the mean of its divisors is an integer number (2342158).

Almost surely, 2^55000863 is an apocalyptic number.

55000863 is a deficient number, since it is larger than the sum of its proper divisors (29316825).

55000863 is an frugal number, since it uses more digits than its factorization.

55000863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 55000863 is about 7416.2566703156. The cubic root of 55000863 is about 380.2972351251.

The spelling of 55000863 in words is "fifty-five million, eight hundred sixty-three", and thus it is an aban number.