231123100 has 36 divisors (see below), whose sum is σ = 540119944. Its totient is φ = 85337280.

The previous prime is 231123043. The next prime is 231123107. The reversal of 231123100 is 1321132.

231123100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231123100² = 106835774707220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231123107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87594 + ... + 90193.

Almost surely, 2^231123100 is an apocalyptic number.

231123100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231123100 is an abundant number, since it is smaller than the sum of its proper divisors (308996844).

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

231123100 is a wasteful number, since it uses less digits than its factorization.

231123100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177814 (or 177807 counting only the distinct ones).

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

The square root of 231123100 is about 15202.7333068761. The cubic root of 231123100 is about 613.6882168262.

Adding to 231123100 its reverse (1321132), we get a palindrome (232444232).

The spelling of 231123100 in words is "two hundred thirty-one million, one hundred twenty-three thousand, one hundred".