231411140 has 48 divisors (see below), whose sum is σ = 515797632. Its totient is φ = 86908416.

The previous prime is 231411133. The next prime is 231411143. The reversal of 231411140 is 41114132.

It is a happy number.

231411140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231411140² = 107102231432199200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (231411143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279407 + ... + 280233.

It is an arithmetic number, because the mean of its divisors is an integer number (10745784).

Almost surely, 2^231411140 is an apocalyptic number.

231411140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231411140 is an abundant number, since it is smaller than the sum of its proper divisors (284386492).

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

231411140 is a wasteful number, since it uses less digits than its factorization.

231411140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676 (or 1674 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 231411140 is about 15212.2036536460. The cubic root of 231411140 is about 613.9430498166.

Adding to 231411140 its reverse (41114132), we get a palindrome (272525272).

The spelling of 231411140 in words is "two hundred thirty-one million, four hundred eleven thousand, one hundred forty".