523213 has 2 divisors, whose sum is σ = 523214. Its totient is φ = 523212.

The previous prime is 523207. The next prime is 523219. The reversal of 523213 is 312325.

It is a balanced prime because it is at equal distance from previous prime (523207) and next prime (523219).

It can be written as a sum of positive squares in only one way, i.e., 522729 + 484 = 723^2 + 22^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261606 + 261607.

It is an arithmetic number, because the mean of its divisors is an integer number (261607).

2⁵²³²¹³ is an apocalyptic number.

It is an amenable number.

523213 is a deficient number, since it is larger than the sum of its proper divisors (1).

523213 is an equidigital number, since it uses as much as digits as its factorization.

523213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 16.

The square root of 523213 is about 723.3346390157. The cubic root of 523213 is about 80.5797981909.

Adding to 523213 its reverse (312325), we get a palindrome (835538).

The spelling of 523213 in words is "five hundred twenty-three thousand, two hundred thirteen".