551285999 has 16 divisors (see below), whose sum is σ = 613171104. Its totient is φ = 491443200.

The previous prime is 551285957. The next prime is 551286023. The reversal of 551285999 is 999582155.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551285999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 551285999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551285699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143447 + ... + 147239.

It is an arithmetic number, because the mean of its divisors is an integer number (38323194).

Almost surely, 2^551285999 is an apocalyptic number.

551285999 is a deficient number, since it is larger than the sum of its proper divisors (61885105).

551285999 is a wasteful number, since it uses less digits than its factorization.

551285999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4058.

The product of its digits is 1458000, while the sum is 53.

The square root of 551285999 is about 23479.4803818142. The cubic root of 551285999 is about 819.9593470824.

The spelling of 551285999 in words is "five hundred fifty-one million, two hundred eighty-five thousand, nine hundred ninety-nine".