231323220000 has 180 divisors, whose sum is σ = 822019268070. Its totient is φ = 61686144000.

The previous prime is 231323219957. The next prime is 231323220013. The reversal of 231323220000 is 22323132.

It is a happy number.

231323220000 is a `hidden beast` number, since 231 + 3 + 232 + 200 + 0 + 0 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 957778704 + 230365441296 = 30948^2 + 479964^2 .

It is a tau number, because it is divible by the number of its divisors (180).

It is a super-2 number, since 2×231323220000² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 462565 + ... + 822564.

Almost surely, 2^231323220000 is an apocalyptic number.

231323220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231323220000 is an abundant number, since it is smaller than the sum of its proper divisors (590696048070).

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

231323220000 is a wasteful number, since it uses less digits than its factorization.

231323220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285165 (or 1285139 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 231323220000 its reverse (22323132), we get a palindrome (231345543132).

The spelling of 231323220000 in words is "two hundred thirty-one billion, three hundred twenty-three million, two hundred twenty thousand".