231244013240 has 32 divisors (see below), whose sum is σ = 523023125760. Its totient is φ = 92013321600.

The previous prime is 231244013233. The next prime is 231244013249. The reversal of 231244013240 is 42310442132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231244013249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15126131 + ... + 15141410.

It is an arithmetic number, because the mean of its divisors is an integer number (16344472680).

Almost surely, 2^231244013240 is an apocalyptic number.

231244013240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231244013240 is an abundant number, since it is smaller than the sum of its proper divisors (291779112520).

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

231244013240 is a wasteful number, since it uses less digits than its factorization.

231244013240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30267743 (or 30267739 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 231244013240 its reverse (42310442132), we get a palindrome (273554455372).

The spelling of 231244013240 in words is "two hundred thirty-one billion, two hundred forty-four million, thirteen thousand, two hundred forty".