231001144 has 64 divisors (see below), whose sum is σ = 501396480. Its totient is φ = 98736000.

The previous prime is 231001139. The next prime is 231001163. The reversal of 231001144 is 441100132.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 122529 + ... + 124399.

It is an arithmetic number, because the mean of its divisors is an integer number (7834320).

Almost surely, 2^231001144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231001144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250698240).

231001144 is an abundant number, since it is smaller than the sum of its proper divisors (270395336).

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

231001144 is a wasteful number, since it uses less digits than its factorization.

231001144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972 (or 1968 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 231001144 is about 15198.7217883610. The cubic root of 231001144 is about 613.5802568572.

Adding to 231001144 its reverse (441100132), we get a palindrome (672101276).

The spelling of 231001144 in words is "two hundred thirty-one million, one thousand, one hundred forty-four".