231113540 has 48 divisors (see below), whose sum is σ = 555714432. Its totient is φ = 79090176.

The previous prime is 231113539. The next prime is 231113551. The reversal of 231113540 is 45311132.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 94412 + ... + 96828.

It is an arithmetic number, because the mean of its divisors is an integer number (11577384).

Almost surely, 2^231113540 is an apocalyptic number.

231113540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231113540 is an abundant number, since it is smaller than the sum of its proper divisors (324600892).

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

231113540 is a wasteful number, since it uses less digits than its factorization.

231113540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116 (or 3114 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 231113540 is about 15202.4188864799. The cubic root of 231113540 is about 613.6797553321.

Adding to 231113540 its reverse (45311132), we get a palindrome (276424672).

It can be divided in two parts, 2311 and 13540, that added together give a palindrome (15851).

The spelling of 231113540 in words is "two hundred thirty-one million, one hundred thirteen thousand, five hundred forty".