551445 has 16 divisors (see below), whose sum is σ = 893760. Its totient is φ = 290304.

The previous prime is 551443. The next prime is 551461. The reversal of 551445 is 544155.

It is not a de Polignac number, because 551445 - 2¹ = 551443 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551445.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1266 + ... + 1644.

It is an arithmetic number, because the mean of its divisors is an integer number (55860).

2⁵⁵¹⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

551445 is a deficient number, since it is larger than the sum of its proper divisors (342315).

551445 is a wasteful number, since it uses less digits than its factorization.

551445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484.

The product of its digits is 2000, while the sum is 24.

The square root of 551445 is about 742.5934284654. The cubic root of 551445 is about 82.0038169946.

The spelling of 551445 in words is "five hundred fifty-one thousand, four hundred forty-five".