551641 has 4 divisors (see below), whose sum is σ = 555984. Its totient is φ = 547300.

The previous prime is 551597. The next prime is 551651. The reversal of 551641 is 146155.

551641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146155 = 5 ⋅29231.

It is a cyclic number.

It is not a de Polignac number, because 551641 - 2⁹ = 551129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1975 + ... + 2236.

It is an arithmetic number, because the mean of its divisors is an integer number (138996).

2⁵⁵¹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

551641 is a deficient number, since it is larger than the sum of its proper divisors (4343).

551641 is a wasteful number, since it uses less digits than its factorization.

551641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4342.

The product of its digits is 600, while the sum is 22.

The square root of 551641 is about 742.7253866672. The cubic root of 551641 is about 82.0135313779.

Adding to 551641 its reverse (146155), we get a palindrome (697796).

The spelling of 551641 in words is "five hundred fifty-one thousand, six hundred forty-one".