551422 has 4 divisors (see below), whose sum is σ = 827136. Its totient is φ = 275710.

The previous prime is 551407. The next prime is 551423. The reversal of 551422 is 224155.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 551422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551423) by changing a digit.

551422 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137854 + ... + 137857.

It is an arithmetic number, because the mean of its divisors is an integer number (206784).

2⁵⁵¹⁴²² is an apocalyptic number.

551422 is a deficient number, since it is larger than the sum of its proper divisors (275714).

551422 is a wasteful number, since it uses less digits than its factorization.

551422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275713.

The product of its digits is 400, while the sum is 19.

The square root of 551422 is about 742.5779420371. The cubic root of 551422 is about 82.0026768906.

Adding to 551422 its reverse (224155), we get a palindrome (775577).

It can be divided in two parts, 55 and 1422, that multiplied together give a triangular number (78210 = T₃₉₅).

The spelling of 551422 in words is "five hundred fifty-one thousand, four hundred twenty-two".