551826 has 32 divisors (see below), whose sum is σ = 1339200. Its totient is φ = 167040.

The previous prime is 551813. The next prime is 551843. The reversal of 551826 is 628155.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 551826.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551826.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130 + ... + 1058.

It is an arithmetic number, because the mean of its divisors is an integer number (41850).

2⁵⁵¹⁸²⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (669600).

551826 is an abundant number, since it is smaller than the sum of its proper divisors (787374).

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

551826 is a wasteful number, since it uses less digits than its factorization.

551826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951 (or 945 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 551826 is about 742.8499175473. The cubic root of 551826 is about 82.0226984555.

It can be divided in two parts, 55 and 1826, that added together give a palindrome (1881).

The spelling of 551826 in words is "five hundred fifty-one thousand, eight hundred twenty-six".