231201431020 has 96 divisors (see below), whose sum is σ = 560240271360. Its totient is φ = 78506238720.

The previous prime is 231201430997. The next prime is 231201431023. The reversal of 231201431020 is 20134102132.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (231201431023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9322677 + ... + 9347443.

It is an arithmetic number, because the mean of its divisors is an integer number (5835836160).

Almost surely, 2^231201431020 is an apocalyptic number.

231201431020 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 231201431020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280120135680).

231201431020 is an abundant number, since it is smaller than the sum of its proper divisors (329038840340).

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

231201431020 is a wasteful number, since it uses less digits than its factorization.

231201431020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25423 (or 25421 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 231201431020 its reverse (20134102132), we get a palindrome (251335533152).

The spelling of 231201431020 in words is "two hundred thirty-one billion, two hundred one million, four hundred thirty-one thousand, twenty".