221331230232 has 64 divisors (see below), whose sum is σ = 632800926720. Its totient is φ = 63194896128.

The previous prime is 221331230231. The next prime is 221331230233. The reversal of 221331230232 is 232032133122.

It is an interprime number because it is at equal distance from previous prime (221331230231) and next prime (221331230233).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221331230231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193173 + ... + 692804.

It is an arithmetic number, because the mean of its divisors is an integer number (9887514480).

Almost surely, 2^221331230232 is an apocalyptic number.

It is an amenable number.

221331230232 is an abundant number, since it is smaller than the sum of its proper divisors (411469696488).

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

221331230232 is a wasteful number, since it uses less digits than its factorization.

221331230232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887480 (or 887476 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 221331230232 its reverse (232032133122), we get a palindrome (453363363354).

The spelling of 221331230232 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred thirty thousand, two hundred thirty-two".