231510140 has 12 divisors (see below), whose sum is σ = 486171336. Its totient is φ = 92604048.

The previous prime is 231510133. The next prime is 231510179. The reversal of 231510140 is 41015132.

231510140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5787734 + ... + 5787773.

It is an arithmetic number, because the mean of its divisors is an integer number (40514278).

Almost surely, 2^231510140 is an apocalyptic number.

231510140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231510140 is an abundant number, since it is smaller than the sum of its proper divisors (254661196).

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

231510140 is a wasteful number, since it uses less digits than its factorization.

231510140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11575516 (or 11575514 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 231510140 is about 15215.4572721295. The cubic root of 231510140 is about 614.0305876602.

Adding to 231510140 its reverse (41015132), we get a palindrome (272525272).

The spelling of 231510140 in words is "two hundred thirty-one million, five hundred ten thousand, one hundred forty".