221034204 has 96 divisors (see below), whose sum is σ = 612057600. Its totient is φ = 68739840.

The previous prime is 221034137. The next prime is 221034211. The reversal of 221034204 is 402430122.

It is a super-2 number, since 2×221034204² = 97712238675827232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240057 + ... + 240975.

It is an arithmetic number, because the mean of its divisors is an integer number (6375600).

Almost surely, 2^221034204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221034204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306028800).

221034204 is an abundant number, since it is smaller than the sum of its proper divisors (391023396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221034204 is a wasteful number, since it uses less digits than its factorization.

221034204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080 (or 1072 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 221034204 is about 14867.2191078224. The cubic root of 221034204 is about 604.6255488602.

Adding to 221034204 its reverse (402430122), we get a palindrome (623464326).

The spelling of 221034204 in words is "two hundred twenty-one million, thirty-four thousand, two hundred four".