231013140 has 24 divisors (see below), whose sum is σ = 646836960. Its totient is φ = 61603488.

The previous prime is 231013103. The next prime is 231013199. The reversal of 231013140 is 41310132.

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

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, 1925050 + ... + 1925169.

It is an arithmetic number, because the mean of its divisors is an integer number (26951540).

Almost surely, 2^231013140 is an apocalyptic number.

231013140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231013140 is an abundant number, since it is smaller than the sum of its proper divisors (415823820).

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

231013140 is a wasteful number, since it uses less digits than its factorization.

231013140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3850231 (or 3850229 counting only the distinct ones).

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

The square root of 231013140 is about 15199.1164216872. The cubic root of 231013140 is about 613.5908778456.

Adding to 231013140 its reverse (41310132), we get a palindrome (272323272).

The spelling of 231013140 in words is "two hundred thirty-one million, thirteen thousand, one hundred forty".