522723 has 4 divisors (see below), whose sum is σ = 696968. Its totient is φ = 348480.

The previous prime is 522719. The next prime is 522737. The reversal of 522723 is 327225.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 522723 - 2² = 522719 is a prime.

It is a D-number.

It is a Duffinian number.

522723 is a lucky number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 522723.

It is not an unprimeable number, because it can be changed into a prime (522703) 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, 87118 + ... + 87123.

It is an arithmetic number, because the mean of its divisors is an integer number (174242).

2⁵²²⁷²³ is an apocalyptic number.

522723 is a deficient number, since it is larger than the sum of its proper divisors (174245).

522723 is a wasteful number, since it uses less digits than its factorization.

522723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174244.

The product of its digits is 840, while the sum is 21.

The square root of 522723 is about 722.9958506105. The cubic root of 522723 is about 80.5546354411.

Adding to 522723 its reverse (327225), we get a palindrome (849948).

It can be divided in two parts, 52272 and 3, that multiplied together give a square (156816 = 396²).

The spelling of 522723 in words is "five hundred twenty-two thousand, seven hundred twenty-three".