551236 has 12 divisors (see below), whose sum is σ = 1102528. Its totient is φ = 236232.

The previous prime is 551233. The next prime is 551269. The reversal of 551236 is 632155.

It is a happy number.

551236 is an admirable number.

It is a super-2 number, since 2×551236² = 607722255392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (551231) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9816 + ... + 9871.

2⁵⁵¹²³⁶ is an apocalyptic number.

It is an amenable number.

551236 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

551236 is a wasteful number, since it uses less digits than its factorization.

551236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19698 (or 19696 counting only the distinct ones).

The product of its digits is 900, while the sum is 22.

The square root of 551236 is about 742.4526920956. The cubic root of 551236 is about 81.9934557538.

It can be divided in two parts, 551 and 236, that added together give a palindrome (787).

The spelling of 551236 in words is "five hundred fifty-one thousand, two hundred thirty-six".