551311663 has 24 divisors (see below), whose sum is σ = 662238720. Its totient is φ = 449490720.

The previous prime is 551311661. The next prime is 551311687. The reversal of 551311663 is 366113155.

551311663 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 551311663 - 2¹ = 551311661 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 (551311661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 417318 + ... + 418636.

It is an arithmetic number, because the mean of its divisors is an integer number (27593280).

Almost surely, 2^551311663 is an apocalyptic number.

551311663 is a deficient number, since it is larger than the sum of its proper divisors (110927057).

551311663 is a wasteful number, since it uses less digits than its factorization.

551311663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455 (or 1426 counting only the distinct ones).

The product of its digits is 8100, while the sum is 31.

The square root of 551311663 is about 23480.0268952146. The cubic root of 551311663 is about 819.9720707323.

The spelling of 551311663 in words is "five hundred fifty-one million, three hundred eleven thousand, six hundred sixty-three".