231002543240 has 32 divisors (see below), whose sum is σ = 594006540480. Its totient is φ = 79200871872.

The previous prime is 231002543141. The next prime is 231002543243. The reversal of 231002543240 is 42345200132.

It is not an unprimeable number, because it can be changed into a prime (231002543243) 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, 412504262 + ... + 412504821.

It is an arithmetic number, because the mean of its divisors is an integer number (18562704390).

Almost surely, 2^231002543240 is an apocalyptic number.

231002543240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231002543240 is an abundant number, since it is smaller than the sum of its proper divisors (363003997240).

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

231002543240 is a wasteful number, since it uses less digits than its factorization.

231002543240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825009101 (or 825009097 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 231002543240 its reverse (42345200132), we get a palindrome (273347743372).

The spelling of 231002543240 in words is "two hundred thirty-one billion, two million, five hundred forty-three thousand, two hundred forty".