231395291120 has 160 divisors (see below), whose sum is σ = 641992243200. Its totient is φ = 77490120960.

The previous prime is 231395291081. The next prime is 231395291123. The reversal of 231395291120 is 21192593132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231395291123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1081865 + ... + 1277975.

It is an arithmetic number, because the mean of its divisors is an integer number (4012451520).

Almost surely, 2^231395291120 is an apocalyptic number.

231395291120 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 231395291120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320996121600).

231395291120 is an abundant number, since it is smaller than the sum of its proper divisors (410596952080).

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

231395291120 is a wasteful number, since it uses less digits than its factorization.

231395291120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196188 (or 196168 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 38.

The spelling of 231395291120 in words is "two hundred thirty-one billion, three hundred ninety-five million, two hundred ninety-one thousand, one hundred twenty".