231321100 has 18 divisors (see below), whose sum is σ = 501967004. Its totient is φ = 92528400.

The previous prime is 231321073. The next prime is 231321107. The reversal of 231321100 is 1123132.

231321100 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231321107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1156506 + ... + 1156705.

Almost surely, 2^231321100 is an apocalyptic number.

231321100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231321100 is an abundant number, since it is smaller than the sum of its proper divisors (270645904).

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

231321100 is a wasteful number, since it uses less digits than its factorization.

231321100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313225 (or 2313218 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 231321100 is about 15209.2438996815. The cubic root of 231321100 is about 613.8634129081.

Adding to 231321100 its reverse (1123132), we get a palindrome (232444232).

The spelling of 231321100 in words is "two hundred thirty-one million, three hundred twenty-one thousand, one hundred".