231011400 has 96 divisors (see below), whose sum is σ = 718480800. Its totient is φ = 61401600.

The previous prime is 231011399. The next prime is 231011413. The reversal of 231011400 is 4110132.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 312231 + ... + 312969.

It is an arithmetic number, because the mean of its divisors is an integer number (7484175).

Almost surely, 2^231011400 is an apocalyptic number.

231011400 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 231011400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359240400).

231011400 is an abundant number, since it is smaller than the sum of its proper divisors (487469400).

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

231011400 is a wasteful number, since it uses less digits than its factorization.

231011400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279 (or 1270 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 231011400 is about 15199.0591814099. The cubic root of 231011400 is about 613.5893373115.

Adding to 231011400 its reverse (4110132), we get a palindrome (235121532).

The spelling of 231011400 in words is "two hundred thirty-one million, eleven thousand, four hundred".