231420340 has 12 divisors (see below), whose sum is σ = 485982756. Its totient is φ = 92568128.

The previous prime is 231420253. The next prime is 231420401. The reversal of 231420340 is 43024132.

It can be written as a sum of positive squares in 2 ways, for example, as 148937616 + 82482724 = 12204^2 + 9082^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5785489 + ... + 5785528.

It is an arithmetic number, because the mean of its divisors is an integer number (40498563).

Almost surely, 2^231420340 is an apocalyptic number.

231420340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231420340 is an abundant number, since it is smaller than the sum of its proper divisors (254562416).

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

231420340 is a wasteful number, since it uses less digits than its factorization.

231420340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11571026 (or 11571024 counting only the distinct ones).

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

The square root of 231420340 is about 15212.5060394401. The cubic root of 231420340 is about 613.9511856986.

Adding to 231420340 its reverse (43024132), we get a palindrome (274444472).

The spelling of 231420340 in words is "two hundred thirty-one million, four hundred twenty thousand, three hundred forty".