551023 has 4 divisors (see below), whose sum is σ = 601128. Its totient is φ = 500920.

The previous prime is 551017. The next prime is 551027. The reversal of 551023 is 320155.

551023 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.

It is a cyclic number.

It is not a de Polignac number, because 551023 - 2¹³ = 542831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 550988 and 551006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551027) 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, 25036 + ... + 25057.

It is an arithmetic number, because the mean of its divisors is an integer number (150282).

2⁵⁵¹⁰²³ is an apocalyptic number.

551023 is a deficient number, since it is larger than the sum of its proper divisors (50105).

551023 is a wasteful number, since it uses less digits than its factorization.

551023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50104.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 551023 is about 742.3092347533. The cubic root of 551023 is about 81.9828935166.

Adding to 551023 its reverse (320155), we get a palindrome (871178).

It can be divided in two parts, 55 and 1023, that multiplied together give a palindrome (56265).

The spelling of 551023 in words is "five hundred fifty-one thousand, twenty-three".