550831 has 2 divisors, whose sum is σ = 550832. Its totient is φ = 550830.

The previous prime is 550813. The next prime is 550841. The reversal of 550831 is 138055.

Together with previous prime (550813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 550831 - 2⁷ = 550703 is a prime.

It is a super-2 number, since 2×550831² = 606829581122, which contains 22 as substring.

It is a Chen prime.

550831 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275415 + 275416.

It is an arithmetic number, because the mean of its divisors is an integer number (275416).

2⁵⁵⁰⁸³¹ is an apocalyptic number.

550831 is a deficient number, since it is larger than the sum of its proper divisors (1).

550831 is an equidigital number, since it uses as much as digits as its factorization.

550831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 550831 is about 742.1798973295. The cubic root of 550831 is about 81.9733702940.

Adding to 550831 its reverse (138055), we get a palindrome (688886).

The spelling of 550831 in words is "five hundred fifty thousand, eight hundred thirty-one".