551811398 has 24 divisors (see below), whose sum is σ = 884815752. Its totient is φ = 258038784.

The previous prime is 551811383. The next prime is 551811437. The reversal of 551811398 is 893118155.

551811398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91286 + ... + 97142.

It is an arithmetic number, because the mean of its divisors is an integer number (36867323).

Almost surely, 2^551811398 is an apocalyptic number.

551811398 is a deficient number, since it is larger than the sum of its proper divisors (333004354).

551811398 is a wasteful number, since it uses less digits than its factorization.

551811398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6056 (or 6039 counting only the distinct ones).

The product of its digits is 43200, while the sum is 41.

The square root of 551811398 is about 23490.6661889356. Note that the first 3 decimals coincide. The cubic root of 551811398 is about 820.2197497502.

The spelling of 551811398 in words is "five hundred fifty-one million, eight hundred eleven thousand, three hundred ninety-eight".