221034213 has 12 divisors (see below), whose sum is σ = 320681088. Its totient is φ = 146705640.

The previous prime is 221034211. The next prime is 221034223. The reversal of 221034213 is 312430122.

It is not a de Polignac number, because 221034213 - 2¹ = 221034211 is a prime.

It is a super-2 number, since 2×221034213² = 97712246633058738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221034211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52053 + ... + 56138.

It is an arithmetic number, because the mean of its divisors is an integer number (26723424).

Almost surely, 2^221034213 is an apocalyptic number.

It is an amenable number.

221034213 is a deficient number, since it is larger than the sum of its proper divisors (99646875).

221034213 is a wasteful number, since it uses less digits than its factorization.

221034213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108424 (or 108421 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 221034213 is about 14867.2194105017. The cubic root of 221034213 is about 604.6255570666.

Adding to 221034213 its reverse (312430122), we get a palindrome (533464335).

The spelling of 221034213 in words is "two hundred twenty-one million, thirty-four thousand, two hundred thirteen".