551857087 has 4 divisors (see below), whose sum is σ = 551968240. Its totient is φ = 551745936.

The previous prime is 551857079. The next prime is 551857093. The reversal of 551857087 is 780758155.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 551857087 - 2³ = 551857079 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 (551857027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47763 + ... + 58180.

It is an arithmetic number, because the mean of its divisors is an integer number (137992060).

Almost surely, 2^551857087 is an apocalyptic number.

551857087 is a deficient number, since it is larger than the sum of its proper divisors (111153).

551857087 is a wasteful number, since it uses less digits than its factorization.

551857087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111152.

The product of its (nonzero) digits is 392000, while the sum is 46.

The square root of 551857087 is about 23491.6386614472. The cubic root of 551857087 is about 820.2423867031.

The spelling of 551857087 in words is "five hundred fifty-one million, eight hundred fifty-seven thousand, eighty-seven".