551500223 has 4 divisors (see below), whose sum is σ = 558144888. Its totient is φ = 544855560.

The previous prime is 551500189. The next prime is 551500237. The reversal of 551500223 is 322005155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322005155 = 5 ⋅64401031.

It is a cyclic number.

It is not a de Polignac number, because 551500223 - 2¹⁰ = 551499199 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 (551500283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3322208 + ... + 3322373.

It is an arithmetic number, because the mean of its divisors is an integer number (139536222).

Almost surely, 2^551500223 is an apocalyptic number.

551500223 is a deficient number, since it is larger than the sum of its proper divisors (6644665).

551500223 is an equidigital number, since it uses as much as digits as its factorization.

551500223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6644664.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 551500223 is about 23484.0418795402. The cubic root of 551500223 is about 820.0655425501.

Adding to 551500223 its reverse (322005155), we get a palindrome (873505378).

The spelling of 551500223 in words is "five hundred fifty-one million, five hundred thousand, two hundred twenty-three".