523212517 has 2 divisors, whose sum is σ = 523212518. Its totient is φ = 523212516.

The previous prime is 523212511. The next prime is 523212583. The reversal of 523212517 is 715212325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289306081 + 233906436 = 17009^2 + 15294^2 .

It is a cyclic number.

It is not a de Polignac number, because 523212517 - 2³ = 523212509 is a prime.

It is equal to p_27512650 and since 523212517 and 27512650 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523212511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261606258 + 261606259.

It is an arithmetic number, because the mean of its divisors is an integer number (261606259).

Almost surely, 2^523212517 is an apocalyptic number.

It is an amenable number.

523212517 is a deficient number, since it is larger than the sum of its proper divisors (1).

523212517 is an equidigital number, since it uses as much as digits as its factorization.

523212517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4200, while the sum is 28.

The square root of 523212517 is about 22873.8391399433. The cubic root of 523212517 is about 805.7977339536.

The spelling of 523212517 in words is "five hundred twenty-three million, two hundred twelve thousand, five hundred seventeen".