521219 has 4 divisors (see below), whose sum is σ = 535344. Its totient is φ = 507096.

The previous prime is 521201. The next prime is 521231. The reversal of 521219 is 912125.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 521219 - 2⁸ = 520963 is a prime.

It is a super-2 number, since 2×521219² = 543338491922, which contains 22 as substring.

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 521219.

It is not an unprimeable number, because it can be changed into a prime (521299) 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, 7007 + ... + 7080.

It is an arithmetic number, because the mean of its divisors is an integer number (133836).

2⁵²¹²¹⁹ is an apocalyptic number.

521219 is a deficient number, since it is larger than the sum of its proper divisors (14125).

521219 is a wasteful number, since it uses less digits than its factorization.

521219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14124.

The product of its digits is 180, while the sum is 20.

The square root of 521219 is about 721.9549847463. The cubic root of 521219 is about 80.4773028613.

The spelling of 521219 in words is "five hundred twenty-one thousand, two hundred nineteen".