521220043 has 8 divisors (see below), whose sum is σ = 546163200. Its totient is φ = 496467048.

The previous prime is 521220041. The next prime is 521220059. The reversal of 521220043 is 340022125.

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 521220043 - 2¹ = 521220041 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 521220043.

It is not an unprimeable number, because it can be changed into a prime (521220041) 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 7 ways as a sum of consecutive naturals, for example, 41913 + ... + 52906.

It is an arithmetic number, because the mean of its divisors is an integer number (68270400).

Almost surely, 2^521220043 is an apocalyptic number.

521220043 is a deficient number, since it is larger than the sum of its proper divisors (24943157).

521220043 is a wasteful number, since it uses less digits than its factorization.

521220043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95081.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 521220043 is about 22830.2440416216. The cubic root of 521220043 is about 804.7735654171.

Adding to 521220043 its reverse (340022125), we get a palindrome (861242168).

The spelling of 521220043 in words is "five hundred twenty-one million, two hundred twenty thousand, forty-three".