551387867 has 4 divisors (see below), whose sum is σ = 557072376. Its totient is φ = 545703360.

The previous prime is 551387833. The next prime is 551387869. The reversal of 551387867 is 768783155.

551387867 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 not a de Polignac number, because 551387867 - 2²⁰ = 550339291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551387869) 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, 2842109 + ... + 2842302.

It is an arithmetic number, because the mean of its divisors is an integer number (139268094).

Almost surely, 2^551387867 is an apocalyptic number.

551387867 is a deficient number, since it is larger than the sum of its proper divisors (5684509).

551387867 is an equidigital number, since it uses as much as digits as its factorization.

551387867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5684508.

The product of its digits is 1411200, while the sum is 50.

The square root of 551387867 is about 23481.6495800444. The cubic root of 551387867 is about 820.0098486820.

The spelling of 551387867 in words is "five hundred fifty-one million, three hundred eighty-seven thousand, eight hundred sixty-seven".