231000333140 has 24 divisors (see below), whose sum is σ = 485892080520. Its totient is φ = 92249394048.

The previous prime is 231000333133. The next prime is 231000333197. The reversal of 231000333140 is 41333000132.

231000333140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 24742660804 + 206257672336 = 157298^2 + 454156^2 .

It is a super-2 number, since 2×231000333140² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 7 ways as a sum of consecutive naturals, for example, 9408635 + ... + 9433154.

It is an arithmetic number, because the mean of its divisors is an integer number (20245503355).

Almost surely, 2^231000333140 is an apocalyptic number.

231000333140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231000333140 is an abundant number, since it is smaller than the sum of its proper divisors (254891747380).

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

231000333140 is a wasteful number, since it uses less digits than its factorization.

231000333140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18842411 (or 18842409 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 231000333140 its reverse (41333000132), we get a palindrome (272333333272).

The spelling of 231000333140 in words is "two hundred thirty-one billion, three hundred thirty-three thousand, one hundred forty".