521275161 has 8 divisors (see below), whose sum is σ = 758218464. Its totient is φ = 315924320.

The previous prime is 521275147. The next prime is 521275163. The reversal of 521275161 is 161572125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521275161 - 2²³ = 512886553 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (521275163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7898076 + ... + 7898141.

It is an arithmetic number, because the mean of its divisors is an integer number (94777308).

Almost surely, 2^521275161 is an apocalyptic number.

It is an amenable number.

521275161 is a deficient number, since it is larger than the sum of its proper divisors (236943303).

521275161 is a wasteful number, since it uses less digits than its factorization.

521275161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15796231.

The product of its digits is 4200, while the sum is 30.

The square root of 521275161 is about 22831.4511365353. The cubic root of 521275161 is about 804.8019321607.

The spelling of 521275161 in words is "five hundred twenty-one million, two hundred seventy-five thousand, one hundred sixty-one".