231313340 has 24 divisors (see below), whose sum is σ = 497056560. Its totient is φ = 90373248.

The previous prime is 231313319. The next prime is 231313417. The reversal of 231313340 is 43313132.

It is a super-2 number, since 2×231313340² = 107011722523911200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 133625 + ... + 135344.

It is an arithmetic number, because the mean of its divisors is an integer number (20710690).

Almost surely, 2^231313340 is an apocalyptic number.

231313340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231313340 is an abundant number, since it is smaller than the sum of its proper divisors (265743220).

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

231313340 is a wasteful number, since it uses less digits than its factorization.

231313340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269021 (or 269019 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 231313340 is about 15208.9887895284. The cubic root of 231313340 is about 613.8565485201.

Adding to 231313340 its reverse (43313132), we get a palindrome (274626472).

The spelling of 231313340 in words is "two hundred thirty-one million, three hundred thirteen thousand, three hundred forty".