231220220330 has 16 divisors (see below), whose sum is σ = 454032432864. Its totient is φ = 84080080080.

The previous prime is 231220220251. The next prime is 231220220359. The reversal of 231220220330 is 33022022132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1051000892 + ... + 1051001111.

It is an arithmetic number, because the mean of its divisors is an integer number (28377027054).

Almost surely, 2^231220220330 is an apocalyptic number.

231220220330 is a deficient number, since it is larger than the sum of its proper divisors (222812212534).

231220220330 is a wasteful number, since it uses less digits than its factorization.

231220220330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102002021.

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

Adding to 231220220330 its reverse (33022022132), we get a palindrome (264242242462).

The spelling of 231220220330 in words is "two hundred thirty-one billion, two hundred twenty million, two hundred twenty thousand, three hundred thirty".