521895241 has 4 divisors (see below), whose sum is σ = 596451712. Its totient is φ = 447338772.

The previous prime is 521895233. The next prime is 521895247. The reversal of 521895241 is 142598125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 521895241 - 2³ = 521895233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 521895241.

It is not an unprimeable number, because it can be changed into a prime (521895247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37278225 + ... + 37278238.

It is an arithmetic number, because the mean of its divisors is an integer number (149112928).

Almost surely, 2^521895241 is an apocalyptic number.

It is an amenable number.

521895241 is a deficient number, since it is larger than the sum of its proper divisors (74556471).

521895241 is an equidigital number, since it uses as much as digits as its factorization.

521895241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74556470.

The product of its digits is 28800, while the sum is 37.

The square root of 521895241 is about 22845.0266141233. The cubic root of 521895241 is about 805.1209216136.

The spelling of 521895241 in words is "five hundred twenty-one million, eight hundred ninety-five thousand, two hundred forty-one".