231441140 has 48 divisors (see below), whose sum is σ = 557961600. Its totient is φ = 78993792.

The previous prime is 231441121. The next prime is 231441149. The reversal of 231441140 is 41144132.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231441149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28451 + ... + 35669.

It is an arithmetic number, because the mean of its divisors is an integer number (11624200).

Almost surely, 2^231441140 is an apocalyptic number.

231441140 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 231441140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278980800).

231441140 is an abundant number, since it is smaller than the sum of its proper divisors (326520460).

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

231441140 is a wasteful number, since it uses less digits than its factorization.

231441140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7464 (or 7462 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 231441140 is about 15213.1896721233. The cubic root of 231441140 is about 613.9695790719.

Adding to 231441140 its reverse (41144132), we get a palindrome (272585272).

The spelling of 231441140 in words is "two hundred thirty-one million, four hundred forty-one thousand, one hundred forty".