551946 has 16 divisors (see below), whose sum is σ = 1121184. Its totient is φ = 181104.

The previous prime is 551933. The next prime is 551951. The reversal of 551946 is 649155.

It is an unprimeable number.

551946 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 7 ways as a sum of consecutive naturals, for example, 285 + ... + 1088.

It is an arithmetic number, because the mean of its divisors is an integer number (70074).

2⁵⁵¹⁹⁴⁶ is an apocalyptic number.

551946 is an abundant number, since it is smaller than the sum of its proper divisors (569238).

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

551946 is a wasteful number, since it uses less digits than its factorization.

551946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445.

The product of its digits is 5400, while the sum is 30.

The square root of 551946 is about 742.9306831731. The cubic root of 551946 is about 82.0286435725.

It can be divided in two parts, 5519 and 46, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 551946 in words is "five hundred fifty-one thousand, nine hundred forty-six".