521230223 has 2 divisors, whose sum is σ = 521230224. Its totient is φ = 521230222.

The previous prime is 521230207. The next prime is 521230291. The reversal of 521230223 is 322032125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521230223 - 2⁴ = 521230207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521230195 and 521230204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521236223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260615111 + 260615112.

It is an arithmetic number, because the mean of its divisors is an integer number (260615112).

Almost surely, 2^521230223 is an apocalyptic number.

521230223 is a deficient number, since it is larger than the sum of its proper divisors (1).

521230223 is an equidigital number, since it uses as much as digits as its factorization.

521230223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 521230223 is about 22830.4669904056. The cubic root of 521230223 is about 804.7788047536.

Adding to 521230223 its reverse (322032125), we get a palindrome (843262348).

The spelling of 521230223 in words is "five hundred twenty-one million, two hundred thirty thousand, two hundred twenty-three".