231331320330 has 64 divisors (see below), whose sum is σ = 606587097600. Its totient is φ = 55995168320.

The previous prime is 231331320323. The next prime is 231331320343. The reversal of 231331320330 is 33023133132.

It is a self number, because there is not a number n which added to its sum of digits gives 231331320330.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 314400 + ... + 749339.

It is an arithmetic number, because the mean of its divisors is an integer number (9477923400).

Almost surely, 2^231331320330 is an apocalyptic number.

231331320330 is an abundant number, since it is smaller than the sum of its proper divisors (375255777270).

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

231331320330 is a wasteful number, since it uses less digits than its factorization.

231331320330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064419.

The product of its (nonzero) digits is 2916, while the sum is 24.

Adding to 231331320330 its reverse (33023133132), we get a palindrome (264354453462).

The spelling of 231331320330 in words is "two hundred thirty-one billion, three hundred thirty-one million, three hundred twenty thousand, three hundred thirty".