231101431213240 has 64 divisors (see below), whose sum is σ = 608080842293760. Its totient is φ = 77392107192960.

The previous prime is 231101431213229. The next prime is 231101431213313. The reversal of 231101431213240 is 42312134101132.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 231101431213199 and 231101431213208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9597223476 + ... + 9597247555.

It is an arithmetic number, because the mean of its divisors is an integer number (9501263160840).

Almost surely, 2^{231101431213240} is an apocalyptic number.

231101431213240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231101431213240 is an abundant number, since it is smaller than the sum of its proper divisors (376979411080520).

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

231101431213240 is a wasteful number, since it uses less digits than its factorization.

231101431213240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19194471092 (or 19194471088 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 231101431213240 its reverse (42312134101132), we get a palindrome (273413565314372).

The spelling of 231101431213240 in words is "two hundred thirty-one trillion, one hundred one billion, four hundred thirty-one million, two hundred thirteen thousand, two hundred forty".