231001340 has 24 divisors (see below), whose sum is σ = 491938272. Its totient is φ = 91098560.

The previous prime is 231001319. The next prime is 231001357. The reversal of 231001340 is 43100132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79919 + ... + 82758.

It is an arithmetic number, because the mean of its divisors is an integer number (20497428).

Almost surely, 2^231001340 is an apocalyptic number.

231001340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231001340 is an abundant number, since it is smaller than the sum of its proper divisors (260936932).

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

231001340 is a wasteful number, since it uses less digits than its factorization.

231001340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162757 (or 162755 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 231001340 is about 15198.7282362703. The cubic root of 231001340 is about 613.5804303942.

Adding to 231001340 its reverse (43100132), we get a palindrome (274101472).

The spelling of 231001340 in words is "two hundred thirty-one million, one thousand, three hundred forty".