551857551 has 12 divisors (see below), whose sum is σ = 855942552. Its totient is φ = 315347088.

The previous prime is 551857549. The next prime is 551857591. The reversal of 551857551 is 155758155.

551857551 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 551857551 - 2¹ = 551857549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551857531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1876920 + ... + 1877213.

It is an arithmetic number, because the mean of its divisors is an integer number (71328546).

Almost surely, 2^551857551 is an apocalyptic number.

551857551 is a deficient number, since it is larger than the sum of its proper divisors (304085001).

551857551 is a wasteful number, since it uses less digits than its factorization.

551857551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3754150 (or 3754143 counting only the distinct ones).

The product of its digits is 175000, while the sum is 42.

The square root of 551857551 is about 23491.6485372994. The cubic root of 551857551 is about 820.2426165889.

The spelling of 551857551 in words is "five hundred fifty-one million, eight hundred fifty-seven thousand, five hundred fifty-one".