221013213 has 8 divisors (see below), whose sum is σ = 294756000. Its totient is φ = 147306288.

The previous prime is 221013203. The next prime is 221013217. The reversal of 221013213 is 312310122.

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

It is not a de Polignac number, because 221013213 - 2¹⁴ = 220996829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221013192 and 221013201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221013217) 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, 13363 + ... + 24911.

It is an arithmetic number, because the mean of its divisors is an integer number (36844500).

Almost surely, 2^221013213 is an apocalyptic number.

It is an amenable number.

221013213 is a deficient number, since it is larger than the sum of its proper divisors (73742787).

221013213 is a wasteful number, since it uses less digits than its factorization.

221013213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17931.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 221013213 is about 14866.5131419577. The cubic root of 221013213 is about 604.6064083887.

Adding to 221013213 its reverse (312310122), we get a palindrome (533323335).

The spelling of 221013213 in words is "two hundred twenty-one million, thirteen thousand, two hundred thirteen".