221350213 has 16 divisors (see below), whose sum is σ = 259914240. Its totient is φ = 184571136.

The previous prime is 221350177. The next prime is 221350219. The reversal of 221350213 is 312053122.

It is a cyclic number.

It is not a de Polignac number, because 221350213 - 2⁹ = 221349701 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 (221350219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54973 + ... + 58861.

It is an arithmetic number, because the mean of its divisors is an integer number (16244640).

Almost surely, 2^221350213 is an apocalyptic number.

It is an amenable number.

221350213 is a deficient number, since it is larger than the sum of its proper divisors (38564027).

221350213 is a wasteful number, since it uses less digits than its factorization.

221350213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4116.

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

The square root of 221350213 is about 14877.8430224277. The cubic root of 221350213 is about 604.9135527509.

The spelling of 221350213 in words is "two hundred twenty-one million, three hundred fifty thousand, two hundred thirteen".