521242617 has 16 divisors (see below), whose sum is σ = 794984832. Its totient is φ = 297586560.

The previous prime is 521242609. The next prime is 521242663. The reversal of 521242617 is 716242125.

It is not a de Polignac number, because 521242617 - 2³ = 521242609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (521242697) 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 in 15 ways as a sum of consecutive naturals, for example, 14293 + ... + 35309.

It is an arithmetic number, because the mean of its divisors is an integer number (49686552).

Almost surely, 2^521242617 is an apocalyptic number.

It is an amenable number.

521242617 is a deficient number, since it is larger than the sum of its proper divisors (273742215).

521242617 is a wasteful number, since it uses less digits than its factorization.

521242617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22208.

The product of its digits is 6720, while the sum is 30.

The square root of 521242617 is about 22830.7384243261. The cubic root of 521242617 is about 804.7851834765.

The spelling of 521242617 in words is "five hundred twenty-one million, two hundred forty-two thousand, six hundred seventeen".