231100452 has 120 divisors (see below), whose sum is σ = 670498752. Its totient is φ = 68817600.

The previous prime is 231100433. The next prime is 231100453. The reversal of 231100452 is 254001132.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (231100453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 216873 + ... + 217935.

Almost surely, 2^231100452 is an apocalyptic number.

231100452 is a gapful number since it is divisible by the number (22) 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 231100452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335249376).

231100452 is an abundant number, since it is smaller than the sum of its proper divisors (439398300).

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

231100452 is a wasteful number, since it uses less digits than its factorization.

231100452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151 (or 1140 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 231100452 is about 15201.9884225716. The cubic root of 231100452 is about 613.6681708496.

Adding to 231100452 its reverse (254001132), we get a palindrome (485101584).

The spelling of 231100452 in words is "two hundred thirty-one million, one hundred thousand, four hundred fifty-two".