521117201 has 16 divisors (see below), whose sum is σ = 604050048. Its totient is φ = 444307200.

The previous prime is 521117173. The next prime is 521117203. The reversal of 521117201 is 102711125.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521117201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521117203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50036 + ... + 59546.

It is an arithmetic number, because the mean of its divisors is an integer number (37753128).

Almost surely, 2^521117201 is an apocalyptic number.

It is an amenable number.

521117201 is a deficient number, since it is larger than the sum of its proper divisors (82932847).

521117201 is a wasteful number, since it uses less digits than its factorization.

521117201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9832.

The product of its (nonzero) digits is 140, while the sum is 20.

The square root of 521117201 is about 22827.9916111777. The cubic root of 521117201 is about 804.7206319404.

Adding to 521117201 its reverse (102711125), we get a palindrome (623828326).

The spelling of 521117201 in words is "five hundred twenty-one million, one hundred seventeen thousand, two hundred one".