521032213 has 8 divisors (see below), whose sum is σ = 561289400. Its totient is φ = 480800448.

The previous prime is 521032207. The next prime is 521032243. The reversal of 521032213 is 312230125.

It can be written as a sum of positive squares in 4 ways, for example, as 142884 + 520889329 = 378^2 + 22823^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521032213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521032243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72883 + ... + 79711.

It is an arithmetic number, because the mean of its divisors is an integer number (70161175).

Almost surely, 2^521032213 is an apocalyptic number.

It is an amenable number.

521032213 is a deficient number, since it is larger than the sum of its proper divisors (40257187).

521032213 is a wasteful number, since it uses less digits than its factorization.

521032213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12711.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 521032213 is about 22826.1300486964. The cubic root of 521032213 is about 804.6768827830.

Adding to 521032213 its reverse (312230125), we get a palindrome (833262338).

The spelling of 521032213 in words is "five hundred twenty-one million, thirty-two thousand, two hundred thirteen".