521166063 has 16 divisors (see below), whose sum is σ = 775691136. Its totient is φ = 308511840.

The previous prime is 521166049. The next prime is 521166071. The reversal of 521166063 is 360661125.

It is not a de Polignac number, because 521166063 - 2⁸ = 521165807 is a prime.

It is a super-2 number, since 2×521166063² = 543228130445839938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 521166063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521166043) 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, 182220 + ... + 185057.

It is an arithmetic number, because the mean of its divisors is an integer number (48480696).

Almost surely, 2^521166063 is an apocalyptic number.

521166063 is a deficient number, since it is larger than the sum of its proper divisors (254525073).

521166063 is a wasteful number, since it uses less digits than its factorization.

521166063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367334.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 521166063 is about 22829.0618072666. The cubic root of 521166063 is about 804.7457824123.

The spelling of 521166063 in words is "five hundred twenty-one million, one hundred sixty-six thousand, sixty-three".