231520441111135 has 32 divisors (see below), whose sum is σ = 304119925678080. Its totient is φ = 167802206544000.

The previous prime is 231520441111133. The next prime is 231520441111147. The reversal of 231520441111135 is 531111144025132.

It is not a de Polignac number, because 231520441111135 - 2¹ = 231520441111133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231520441111135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231520441111133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21417460 + ... + 30360310.

It is an arithmetic number, because the mean of its divisors is an integer number (9503747677440).

Almost surely, 2^{231520441111135} is an apocalyptic number.

231520441111135 is a deficient number, since it is larger than the sum of its proper divisors (72599484566945).

231520441111135 is a wasteful number, since it uses less digits than its factorization.

231520441111135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8944479.

The product of its (nonzero) digits is 14400, while the sum is 34.

Adding to 231520441111135 its reverse (531111144025132), we get a palindrome (762631585136267).

The spelling of 231520441111135 in words is "two hundred thirty-one trillion, five hundred twenty billion, four hundred forty-one million, one hundred eleven thousand, one hundred thirty-five".