231323031040 has 160 divisors (see below), whose sum is σ = 593084299104. Its totient is φ = 86222438400.

The previous prime is 231323030993. The next prime is 231323031041. The reversal of 231323031040 is 40130323132.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231323031041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4369207 + ... + 4421833.

Almost surely, 2^231323031040 is an apocalyptic number.

231323031040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231323031040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296542149552).

231323031040 is an abundant number, since it is smaller than the sum of its proper divisors (361761268064).

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

231323031040 is a wasteful number, since it uses less digits than its factorization.

231323031040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52768 (or 52752 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 231323031040 its reverse (40130323132), we get a palindrome (271453354172).

The spelling of 231323031040 in words is "two hundred thirty-one billion, three hundred twenty-three million, thirty-one thousand, forty".