231023100 has 288 divisors, whose sum is σ = 850945536. Its totient is φ = 47001600.

The previous prime is 231023099. The next prime is 231023101. The reversal of 231023100 is 1320132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (231023099) and next prime (231023101).

It is a super-2 number, since 2×231023100² = 106743345467220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231023101) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1686232 + ... + 1686368.

It is an arithmetic number, because the mean of its divisors is an integer number (2954672).

Almost surely, 2^231023100 is an apocalyptic number.

231023100 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 231023100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (425472768).

231023100 is an abundant number, since it is smaller than the sum of its proper divisors (619922436).

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

231023100 is a wasteful number, since it uses less digits than its factorization.

231023100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 231023100 is about 15199.4440687809. Note that the first 3 decimals coincide. The cubic root of 231023100 is about 613.5996959259.

Adding to 231023100 its reverse (1320132), we get a palindrome (232343232).

The spelling of 231023100 in words is "two hundred thirty-one million, twenty-three thousand, one hundred".