231204340 has 24 divisors (see below), whose sum is σ = 485856000. Its totient is φ = 92419488.

The previous prime is 231204317. The next prime is 231204341. The reversal of 231204340 is 43402132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231204341) 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, 37089 + ... + 42871.

It is an arithmetic number, because the mean of its divisors is an integer number (20244000).

Almost surely, 2^231204340 is an apocalyptic number.

231204340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231204340 is an abundant number, since it is smaller than the sum of its proper divisors (254651660).

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

231204340 is a wasteful number, since it uses less digits than its factorization.

231204340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7791 (or 7789 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 231204340 is about 15205.4049600792. The cubic root of 231204340 is about 613.7601124097.

Adding to 231204340 its reverse (43402132), we get a palindrome (274606472).

The spelling of 231204340 in words is "two hundred thirty-one million, two hundred four thousand, three hundred forty".