231345340 has 12 divisors (see below), whose sum is σ = 485825256. Its totient is φ = 92538128.

The previous prime is 231345337. The next prime is 231345347. The reversal of 231345340 is 43543132.

231345340 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231345347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5783614 + ... + 5783653.

It is an arithmetic number, because the mean of its divisors is an integer number (40485438).

Almost surely, 2^231345340 is an apocalyptic number.

231345340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231345340 is an abundant number, since it is smaller than the sum of its proper divisors (254479916).

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

231345340 is a wasteful number, since it uses less digits than its factorization.

231345340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11567276 (or 11567274 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 231345340 is about 15210.0407626015. The cubic root of 231345340 is about 613.8848542861.

Adding to 231345340 its reverse (43543132), we get a palindrome (274888472).

The spelling of 231345340 in words is "two hundred thirty-one million, three hundred forty-five thousand, three hundred forty".