230311221 has 12 divisors (see below), whose sum is σ = 357217632. Its totient is φ = 131606328.

The previous prime is 230311201. The next prime is 230311229. The reversal of 230311221 is 122113032.

It is not a de Polignac number, because 230311221 - 2⁶ = 230311157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 230311221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230311229) 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, 783225 + ... + 783518.

It is an arithmetic number, because the mean of its divisors is an integer number (29768136).

Almost surely, 2^230311221 is an apocalyptic number.

230311221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

230311221 is a deficient number, since it is larger than the sum of its proper divisors (126906411).

230311221 is a wasteful number, since it uses less digits than its factorization.

230311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566760 (or 1566753 counting only the distinct ones).

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

The square root of 230311221 is about 15176.0080719536. The cubic root of 230311221 is about 612.9687948441.

Adding to 230311221 its reverse (122113032), we get a palindrome (352424253).

The spelling of 230311221 in words is "two hundred thirty million, three hundred eleven thousand, two hundred twenty-one".