234220221 has 32 divisors (see below), whose sum is σ = 360023040. Its totient is φ = 150336000.

The previous prime is 234220213. The next prime is 234220241. The reversal of 234220221 is 122022432.

234220221 is a `hidden beast` number, since 23 + 422 + 0 + 221 = 666.

It is not a de Polignac number, because 234220221 - 2³ = 234220213 is a prime.

It is a super-2 number, since 2×234220221² = 109718223850577682, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 234220194 and 234220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234220241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194421 + ... + 195621.

It is an arithmetic number, because the mean of its divisors is an integer number (11250720).

Almost surely, 2^234220221 is an apocalyptic number.

It is an amenable number.

234220221 is a deficient number, since it is larger than the sum of its proper divisors (125802819).

234220221 is a wasteful number, since it uses less digits than its factorization.

234220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474 (or 1468 counting only the distinct ones).

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

The square root of 234220221 is about 15304.2549965688. The cubic root of 234220221 is about 616.4172667970.

Adding to 234220221 its reverse (122022432), we get a palindrome (356242653).

The spelling of 234220221 in words is "two hundred thirty-four million, two hundred twenty thousand, two hundred twenty-one".