231312211000 has 64 divisors (see below), whose sum is σ = 582906804480. Its totient is φ = 85407580800.

The previous prime is 231312210977. The next prime is 231312211049. The reversal of 231312211000 is 112213132.

231312211000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8883624 + ... + 8909623.

It is an arithmetic number, because the mean of its divisors is an integer number (9107918820).

Almost surely, 2^231312211000 is an apocalyptic number.

231312211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231312211000 is an abundant number, since it is smaller than the sum of its proper divisors (351594593480).

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

231312211000 is a wasteful number, since it uses less digits than its factorization.

231312211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17793281 (or 17793267 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 231312211000 its reverse (112213132), we get a palindrome (231424424132).

The spelling of 231312211000 in words is "two hundred thirty-one billion, three hundred twelve million, two hundred eleven thousand".