551206231 has 4 divisors (see below), whose sum is σ = 551290464. Its totient is φ = 551122000.

The previous prime is 551206223. The next prime is 551206267. The reversal of 551206231 is 132602155.

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 551206231 - 2³ = 551206223 is a prime.

It is a super-2 number, since 2×551206231² = 607656618186450722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551206196 and 551206205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551206031) 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, 31390 + ... + 45691.

It is an arithmetic number, because the mean of its divisors is an integer number (137822616).

Almost surely, 2^551206231 is an apocalyptic number.

551206231 is a deficient number, since it is larger than the sum of its proper divisors (84233).

551206231 is an equidigital number, since it uses as much as digits as its factorization.

551206231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84232.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 551206231 is about 23477.7816456325. The cubic root of 551206231 is about 819.9197973313.

Adding to 551206231 its reverse (132602155), we get a palindrome (683808386).

The spelling of 551206231 in words is "five hundred fifty-one million, two hundred six thousand, two hundred thirty-one".