523330217 has 4 divisors (see below), whose sum is σ = 523379796. Its totient is φ = 523280640.

The previous prime is 523330153. The next prime is 523330237. The reversal of 523330217 is 712033325.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 326741776 + 196588441 = 18076^2 + 14021^2 .

It is a cyclic number.

It is not a de Polignac number, because 523330217 - 2⁶ = 523330153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523330237) 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, 1928 + ... + 32409.

It is an arithmetic number, because the mean of its divisors is an integer number (130844949).

Almost surely, 2^523330217 is an apocalyptic number.

It is an amenable number.

523330217 is a deficient number, since it is larger than the sum of its proper divisors (49579).

523330217 is a wasteful number, since it uses less digits than its factorization.

523330217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49578.

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 523330217 is about 22876.4118034276. The cubic root of 523330217 is about 805.8581525403.

The spelling of 523330217 in words is "five hundred twenty-three million, three hundred thirty thousand, two hundred seventeen".