231113100 has 144 divisors (see below), whose sum is σ = 702955008. Its totient is φ = 58556160.

The previous prime is 231113087. The next prime is 231113101. The reversal of 231113100 is 1311132.

231113100 = 1756² + 1757² + ... + 1827².

It is a super-2 number, since 2×231113100² = 106826529983220000, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (231113101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 521479 + ... + 521921.

It is an arithmetic number, because the mean of its divisors is an integer number (4881632).

Almost surely, 2^231113100 is an apocalyptic number.

231113100 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 231113100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351477504).

231113100 is an abundant number, since it is smaller than the sum of its proper divisors (471841908).

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

231113100 is a wasteful number, since it uses less digits than its factorization.

231113100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 231113100 is about 15202.4044150917. The cubic root of 231113100 is about 613.6793658853.

Adding to 231113100 its reverse (1311132), we get a palindrome (232424232).

The spelling of 231113100 in words is "two hundred thirty-one million, one hundred thirteen thousand, one hundred".