551448 has 80 divisors (see below), whose sum is σ = 1655280. Its totient is φ = 171072.

The previous prime is 551443. The next prime is 551461. The reversal of 551448 is 844155.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551443) by changing a digit.

551448 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14886 + ... + 14922.

It is an arithmetic number, because the mean of its divisors is an integer number (20691).

2⁵⁵¹⁴⁴⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (827640).

551448 is an abundant number, since it is smaller than the sum of its proper divisors (1103832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551448 is a wasteful number, since it uses less digits than its factorization.

551448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78 (or 65 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 551448 is about 742.5954484105. The cubic root of 551448 is about 82.0039657015.

It can be divided in two parts, 551 and 448, that added together give a palindrome (999).

The spelling of 551448 in words is "five hundred fifty-one thousand, four hundred forty-eight".