231206340 has 48 divisors (see below), whose sum is σ = 664880832. Its totient is φ = 59988096.

The previous prime is 231206333. The next prime is 231206351. The reversal of 231206340 is 43602132.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 49854 + ... + 54293.

It is an arithmetic number, because the mean of its divisors is an integer number (13851684).

Almost surely, 2^231206340 is an apocalyptic number.

231206340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231206340 is an abundant number, since it is smaller than the sum of its proper divisors (433674492).

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

231206340 is a wasteful number, since it uses less digits than its factorization.

231206340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104196 (or 104194 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 231206340 is about 15205.4707260249. The cubic root of 231206340 is about 613.7618821525.

Adding to 231206340 its reverse (43602132), we get a palindrome (274808472).

The spelling of 231206340 in words is "two hundred thirty-one million, two hundred six thousand, three hundred forty".