231000140 has 24 divisors (see below), whose sum is σ = 554400672. Its totient is φ = 79200000.

The previous prime is 231000113. The next prime is 231000151. The reversal of 231000140 is 41000132.

It is a happy number.

It is a super-2 number, since 2×231000140² = 106722129360039200, which contains 22 as substring.

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, 824861 + ... + 825140.

It is an arithmetic number, because the mean of its divisors is an integer number (23100028).

Almost surely, 2^231000140 is an apocalyptic number.

231000140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231000140 is an abundant number, since it is smaller than the sum of its proper divisors (323400532).

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

231000140 is a wasteful number, since it uses less digits than its factorization.

231000140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650017 (or 1650015 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 231000140 is about 15198.6887592318. The cubic root of 231000140 is about 613.5793679216.

Adding to 231000140 its reverse (41000132), we get a palindrome (272000272).

The spelling of 231000140 in words is "two hundred thirty-one million, one hundred forty", and thus it is an aban number.