230221311 has 4 divisors (see below), whose sum is σ = 306961752. Its totient is φ = 153480872.

The previous prime is 230221301. The next prime is 230221331. The reversal of 230221311 is 113122032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 230221311 - 2¹³ = 230213119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230221301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38370216 + ... + 38370221.

It is an arithmetic number, because the mean of its divisors is an integer number (76740438).

Almost surely, 2^230221311 is an apocalyptic number.

230221311 is a deficient number, since it is larger than the sum of its proper divisors (76740441).

230221311 is an equidigital number, since it uses as much as digits as its factorization.

230221311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76740440.

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

The square root of 230221311 is about 15173.0455413539. The cubic root of 230221311 is about 612.8890198954.

Adding to 230221311 its reverse (113122032), we get a palindrome (343343343).

The spelling of 230221311 in words is "two hundred thirty million, two hundred twenty-one thousand, three hundred eleven".