231531540352133 has 16 divisors (see below), whose sum is σ = 264676823286144. Its totient is φ = 198403596771840.

The previous prime is 231531540352129. The next prime is 231531540352139. The reversal of 231531540352133 is 331253045135132.

It is a cyclic number.

It is not a de Polignac number, because 231531540352133 - 2² = 231531540352129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231531540352139) 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 15 ways as a sum of consecutive naturals, for example, 2281790066 + ... + 2281891532.

It is an arithmetic number, because the mean of its divisors is an integer number (16542301455384).

Almost surely, 2^{231531540352133} is an apocalyptic number.

It is an amenable number.

231531540352133 is a deficient number, since it is larger than the sum of its proper divisors (33145282934011).

231531540352133 is a wasteful number, since it uses less digits than its factorization.

231531540352133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183692.

The product of its (nonzero) digits is 486000, while the sum is 41.

Adding to 231531540352133 its reverse (331253045135132), we get a palindrome (562784585487265).

The spelling of 231531540352133 in words is "two hundred thirty-one trillion, five hundred thirty-one billion, five hundred forty million, three hundred fifty-two thousand, one hundred thirty-three".