551213985 has 48 divisors (see below), whose sum is σ = 1029283200. Its totient is φ = 251161344.

The previous prime is 551213953. The next prime is 551213987. The reversal of 551213985 is 589312155.

551213985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 551213985 - 2⁵ = 551213953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551213987) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 262821 + ... + 264909.

It is an arithmetic number, because the mean of its divisors is an integer number (21443400).

Almost surely, 2^551213985 is an apocalyptic number.

It is an amenable number.

551213985 is a deficient number, since it is larger than the sum of its proper divisors (478069215).

551213985 is a wasteful number, since it uses less digits than its factorization.

551213985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470 (or 2463 counting only the distinct ones).

The product of its digits is 54000, while the sum is 39.

The square root of 551213985 is about 23477.9467799039. The cubic root of 551213985 is about 819.9236420074.

The spelling of 551213985 in words is "five hundred fifty-one million, two hundred thirteen thousand, nine hundred eighty-five".