551384839 has 4 divisors (see below), whose sum is σ = 552293824. Its totient is φ = 550475856.

The previous prime is 551384797. The next prime is 551384849. The reversal of 551384839 is 938483155.

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 551384839 - 2¹⁵ = 551352071 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 (551384849) 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, 453582 + ... + 454795.

It is an arithmetic number, because the mean of its divisors is an integer number (138073456).

Almost surely, 2^551384839 is an apocalyptic number.

551384839 is a deficient number, since it is larger than the sum of its proper divisors (908985).

551384839 is an equidigital number, since it uses as much as digits as its factorization.

551384839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908984.

The product of its digits is 518400, while the sum is 46.

The square root of 551384839 is about 23481.5851040768. The cubic root of 551384839 is about 820.0083476247.

The spelling of 551384839 in words is "five hundred fifty-one million, three hundred eighty-four thousand, eight hundred thirty-nine".