231341240 has 32 divisors (see below), whose sum is σ = 560558880. Its totient is φ = 85418112.

The previous prime is 231341239. The next prime is 231341249. The reversal of 231341240 is 42143132.

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 (231341249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221924 + ... + 222963.

It is an arithmetic number, because the mean of its divisors is an integer number (17517465).

Almost surely, 2^231341240 is an apocalyptic number.

231341240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231341240 is an abundant number, since it is smaller than the sum of its proper divisors (329217640).

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

231341240 is a wasteful number, since it uses less digits than its factorization.

231341240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444911 (or 444907 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 231341240 is about 15209.9059826154. The cubic root of 231341240 is about 613.8812277556.

Adding to 231341240 its reverse (42143132), we get a palindrome (273484372).

The spelling of 231341240 in words is "two hundred thirty-one million, three hundred forty-one thousand, two hundred forty".