220331213 has 4 divisors (see below), whose sum is σ = 220402080. Its totient is φ = 220260348.

The previous prime is 220331173. The next prime is 220331227. The reversal of 220331213 is 312133022.

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 a cyclic number.

It is not a de Polignac number, because 220331213 - 2⁶ = 220331149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220331191 and 220331200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220331233) 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, 30545 + ... + 37062.

It is an arithmetic number, because the mean of its divisors is an integer number (55100520).

Almost surely, 2^220331213 is an apocalyptic number.

It is an amenable number.

220331213 is a deficient number, since it is larger than the sum of its proper divisors (70867).

220331213 is an equidigital number, since it uses as much as digits as its factorization.

220331213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70866.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 220331213 is about 14843.5579629683. The cubic root of 220331213 is about 603.9838718045.

Adding to 220331213 its reverse (312133022), we get a palindrome (532464235).

The spelling of 220331213 in words is "two hundred twenty million, three hundred thirty-one thousand, two hundred thirteen".