551913 has 4 divisors (see below), whose sum is σ = 735888. Its totient is φ = 367940.

The previous prime is 551911. The next prime is 551917. The reversal of 551913 is 319155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 551913 - 2¹ = 551911 is a prime.

It is a D-number.

551913 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (551911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91983 + ... + 91988.

It is an arithmetic number, because the mean of its divisors is an integer number (183972).

2⁵⁵¹⁹¹³ is an apocalyptic number.

It is an amenable number.

551913 is a deficient number, since it is larger than the sum of its proper divisors (183975).

551913 is a wasteful number, since it uses less digits than its factorization.

551913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183974.

The product of its digits is 675, while the sum is 24.

The square root of 551913 is about 742.9084735013. The cubic root of 551913 is about 82.0270087512.

The spelling of 551913 in words is "five hundred fifty-one thousand, nine hundred thirteen".