231220203230 has 16 divisors (see below), whose sum is σ = 416278369584. Its totient is φ = 92469858240.

The previous prime is 231220203173. The next prime is 231220203233. The reversal of 231220203230 is 32302022132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231220203233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2224532 + ... + 2326151.

It is an arithmetic number, because the mean of its divisors is an integer number (26017398099).

Almost surely, 2^231220203230 is an apocalyptic number.

231220203230 is a deficient number, since it is larger than the sum of its proper divisors (185058166354).

231220203230 is a wasteful number, since it uses less digits than its factorization.

231220203230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4555771.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 231220203230 its reverse (32302022132), we get a palindrome (263522225362).

The spelling of 231220203230 in words is "two hundred thirty-one billion, two hundred twenty million, two hundred three thousand, two hundred thirty".