551432 has 32 divisors (see below), whose sum is σ = 1214400. Its totient is φ = 229824.

The previous prime is 551423. The next prime is 551443. The reversal of 551432 is 234155.

It is an unprimeable number.

551432 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 in 7 ways as a sum of consecutive naturals, for example, 2294 + ... + 2522.

It is an arithmetic number, because the mean of its divisors is an integer number (37950).

2⁵⁵¹⁴³² 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 551432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (607200).

551432 is an abundant number, since it is smaller than the sum of its proper divisors (662968).

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

551432 is a wasteful number, since it uses less digits than its factorization.

551432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 281 counting only the distinct ones).

The product of its digits is 600, while the sum is 20.

The square root of 551432 is about 742.5846753065. The cubic root of 551432 is about 82.0031725919.

Adding to 551432 its reverse (234155), we get a palindrome (785587).

The spelling of 551432 in words is "five hundred fifty-one thousand, four hundred thirty-two".