551822 has 4 divisors (see below), whose sum is σ = 827736. Its totient is φ = 275910.

The previous prime is 551813. The next prime is 551843. The reversal of 551822 is 228155.

551822 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, and also an emirpimes, since its reverse is a distinct semiprime: 228155 = 5 ⋅45631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137954 + ... + 137957.

It is an arithmetic number, because the mean of its divisors is an integer number (206934).

2⁵⁵¹⁸²² is an apocalyptic number.

551822 is a deficient number, since it is larger than the sum of its proper divisors (275914).

551822 is a wasteful number, since it uses less digits than its factorization.

551822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275913.

The product of its digits is 800, while the sum is 23.

The square root of 551822 is about 742.8472252085. The cubic root of 551822 is about 82.0225002701.

Adding to 551822 its reverse (228155), we get a palindrome (779977).

The spelling of 551822 in words is "five hundred fifty-one thousand, eight hundred twenty-two".