561333 has 4 divisors (see below), whose sum is σ = 748448. Its totient is φ = 374220.

The previous prime is 561313. The next prime is 561343. The reversal of 561333 is 333165.

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.

It is not a de Polignac number, because 561333 - 2¹³ = 553141 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561313) 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, 93553 + ... + 93558.

It is an arithmetic number, because the mean of its divisors is an integer number (187112).

2⁵⁶¹³³³ is an apocalyptic number.

It is an amenable number.

561333 is a deficient number, since it is larger than the sum of its proper divisors (187115).

561333 is a wasteful number, since it uses less digits than its factorization.

561333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187114.

The product of its digits is 810, while the sum is 21.

The square root of 561333 is about 749.2215960582. The cubic root of 561333 is about 82.4910550449.

Adding to 561333 its reverse (333165), we get a palindrome (894498).

The spelling of 561333 in words is "five hundred sixty-one thousand, three hundred thirty-three".