551203243 has 4 divisors (see below), whose sum is σ = 580213960. Its totient is φ = 522192528.

The previous prime is 551203201. The next prime is 551203253. The reversal of 551203243 is 342302155.

551203243 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 551203243 - 2⁹ = 551202731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551203253) 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, 14505330 + ... + 14505367.

It is an arithmetic number, because the mean of its divisors is an integer number (145053490).

Almost surely, 2^551203243 is an apocalyptic number.

551203243 is a deficient number, since it is larger than the sum of its proper divisors (29010717).

551203243 is a wasteful number, since it uses less digits than its factorization.

551203243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29010716.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 551203243 is about 23477.7180109141. The cubic root of 551203243 is about 819.9183157776.

Adding to 551203243 its reverse (342302155), we get a palindrome (893505398).

The spelling of 551203243 in words is "five hundred fifty-one million, two hundred three thousand, two hundred forty-three".