213221513 has 8 divisors (see below), whose sum is σ = 215786496. Its totient is φ = 210672000.

The previous prime is 213221507. The next prime is 213221527. The reversal of 213221513 is 315122312.

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 213221513 - 2²² = 209027209 is a prime.

It is a super-3 number, since 3×213221513³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213221573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25145 + ... + 32537.

It is an arithmetic number, because the mean of its divisors is an integer number (26973312).

Almost surely, 2^213221513 is an apocalyptic number.

It is an amenable number.

213221513 is a deficient number, since it is larger than the sum of its proper divisors (2564983).

213221513 is a wasteful number, since it uses less digits than its factorization.

213221513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7735.

The product of its digits is 360, while the sum is 20.

The square root of 213221513 is about 14602.1064576314. The cubic root of 213221513 is about 597.4162162593.

Adding to 213221513 its reverse (315122312), we get a palindrome (528343825).

The spelling of 213221513 in words is "two hundred thirteen million, two hundred twenty-one thousand, five hundred thirteen".