521022441 has 4 divisors (see below), whose sum is σ = 694696592. Its totient is φ = 347348292.

The previous prime is 521022433. The next prime is 521022499. The reversal of 521022441 is 144220125.

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 not a de Polignac number, because 521022441 - 2³ = 521022433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521022041) 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 3 ways as a sum of consecutive naturals, for example, 86837071 + ... + 86837076.

It is an arithmetic number, because the mean of its divisors is an integer number (173674148).

Almost surely, 2^521022441 is an apocalyptic number.

It is an amenable number.

521022441 is a deficient number, since it is larger than the sum of its proper divisors (173674151).

521022441 is a wasteful number, since it uses less digits than its factorization.

521022441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173674150.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 521022441 is about 22825.9159947635. The cubic root of 521022441 is about 804.6718521588.

Adding to 521022441 its reverse (144220125), we get a palindrome (665242566).

The spelling of 521022441 in words is "five hundred twenty-one million, twenty-two thousand, four hundred forty-one".