231201100 has 72 divisors (see below), whose sum is σ = 557825408. Its totient is φ = 82598400.

The previous prime is 231201059. The next prime is 231201109. The reversal of 231201100 is 1102132.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (231201109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37432 + ... + 43168.

Almost surely, 2^231201100 is an apocalyptic number.

231201100 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 231201100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278912704).

231201100 is an abundant number, since it is smaller than the sum of its proper divisors (326624308).

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

231201100 is a wasteful number, since it uses less digits than its factorization.

231201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5795 (or 5788 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 231201100 is about 15205.2984186434. The cubic root of 231201100 is about 613.7572454046.

Adding to 231201100 its reverse (1102132), we get a palindrome (232303232).

The spelling of 231201100 in words is "two hundred thirty-one million, two hundred one thousand, one hundred".