231131332042140 has 48 divisors (see below), whose sum is σ = 647222395760640. Its totient is φ = 61629815588160.

The previous prime is 231131332042133. The next prime is 231131332042183. The reversal of 231131332042140 is 41240233131132.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 231131332042098 and 231131332042107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161980296 + ... + 163400975.

It is an arithmetic number, because the mean of its divisors is an integer number (13483799911680).

Almost surely, 2^{231131332042140} is an apocalyptic number.

231131332042140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231131332042140 is an abundant number, since it is smaller than the sum of its proper divisors (416091063718500).

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

231131332042140 is a wasteful number, since it uses less digits than its factorization.

231131332042140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325393122 (or 325393120 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 231131332042140 its reverse (41240233131132), we get a palindrome (272371565173272).

The spelling of 231131332042140 in words is "two hundred thirty-one trillion, one hundred thirty-one billion, three hundred thirty-two million, forty-two thousand, one hundred forty".