551503223 has 4 divisors (see below), whose sum is σ = 575481648. Its totient is φ = 527524800.

The previous prime is 551503207. The next prime is 551503243. The reversal of 551503223 is 322305155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322305155 = 5 ⋅64461031.

It is a cyclic number.

It is not a de Polignac number, because 551503223 - 2⁴ = 551503207 is a prime.

It is a super-3 number, since 3×551503223³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551503192 and 551503201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551503243) 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, 11989178 + ... + 11989223.

It is an arithmetic number, because the mean of its divisors is an integer number (143870412).

Almost surely, 2^551503223 is an apocalyptic number.

551503223 is a deficient number, since it is larger than the sum of its proper divisors (23978425).

551503223 is a wasteful number, since it uses less digits than its factorization.

551503223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23978424.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 551503223 is about 23484.1057526149. The cubic root of 551503223 is about 820.0670295196.

Adding to 551503223 its reverse (322305155), we get a palindrome (873808378).

The spelling of 551503223 in words is "five hundred fifty-one million, five hundred three thousand, two hundred twenty-three".