231431311100 has 144 divisors (see below), whose sum is σ = 567658730016. Its totient is φ = 81156096000.

The previous prime is 231431311049. The next prime is 231431311117. The reversal of 231431311100 is 1113134132.

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 polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4573940 + ... + 4624260.

It is an arithmetic number, because the mean of its divisors is an integer number (3942074514).

Almost surely, 2^231431311100 is an apocalyptic number.

231431311100 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 231431311100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283829365008).

231431311100 is an abundant number, since it is smaller than the sum of its proper divisors (336227418916).

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

231431311100 is a wasteful number, since it uses less digits than its factorization.

231431311100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50496 (or 50489 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 231431311100 its reverse (1113134132), we get a palindrome (232544445232).

The spelling of 231431311100 in words is "two hundred thirty-one billion, four hundred thirty-one million, three hundred eleven thousand, one hundred".