551393863 has 4 divisors (see below), whose sum is σ = 551857248. Its totient is φ = 550930480.

The previous prime is 551393839. The next prime is 551393873. The reversal of 551393863 is 368393155.

551393863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551393863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551393873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229903 + ... + 232288.

It is an arithmetic number, because the mean of its divisors is an integer number (137964312).

Almost surely, 2^551393863 is an apocalyptic number.

551393863 is a deficient number, since it is larger than the sum of its proper divisors (463385).

551393863 is a wasteful number, since it uses less digits than its factorization.

551393863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463384.

The product of its digits is 291600, while the sum is 43.

The square root of 551393863 is about 23481.7772538622. Note that the first 3 decimals coincide. The cubic root of 551393863 is about 820.0128210369.

The spelling of 551393863 in words is "five hundred fifty-one million, three hundred ninety-three thousand, eight hundred sixty-three".