231340340 has 48 divisors (see below), whose sum is σ = 605695104. Its totient is φ = 72105600.

The previous prime is 231340309. The next prime is 231340393. The reversal of 231340340 is 43043132.

It is a super-2 number, since 2×231340340² = 107036705822631200, 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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73571 + ... + 76650.

It is an arithmetic number, because the mean of its divisors is an integer number (12618648).

Almost surely, 2^231340340 is an apocalyptic number.

231340340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231340340 is an abundant number, since it is smaller than the sum of its proper divisors (374354764).

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

231340340 is a wasteful number, since it uses less digits than its factorization.

231340340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150248 (or 150246 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 231340340 is about 15209.8763966049. The cubic root of 231340340 is about 613.8804316822.

Adding to 231340340 its reverse (43043132), we get a palindrome (274383472).

The spelling of 231340340 in words is "two hundred thirty-one million, three hundred forty thousand, three hundred forty".