231103140 has 48 divisors (see below), whose sum is σ = 667968000. Its totient is φ = 59639040.

The previous prime is 231103139. The next prime is 231103157. The reversal of 231103140 is 41301132.

231103140 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 2×231103140² = 106817322635719200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 60265 + ... + 63984.

It is an arithmetic number, because the mean of its divisors is an integer number (13916000).

Almost surely, 2^231103140 is an apocalyptic number.

231103140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231103140 is an abundant number, since it is smaller than the sum of its proper divisors (436864860).

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

231103140 is a wasteful number, since it uses less digits than its factorization.

231103140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124292 (or 124290 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 231103140 is about 15202.0768318016. The cubic root of 231103140 is about 613.6705500944.

Adding to 231103140 its reverse (41301132), we get a palindrome (272404272).

The spelling of 231103140 in words is "two hundred thirty-one million, one hundred three thousand, one hundred forty".