231533533412231 has 4 divisors (see below), whose sum is σ = 243719508855000. Its totient is φ = 219347557969464.

The previous prime is 231533533412213. The next prime is 231533533412239. The reversal of 231533533412231 is 132214335335132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231533533412231 - 2³⁴ = 231516353543047 is a prime.

It is a super-2 number, since 2×231533533412231² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231533533412239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6092987721356 + ... + 6092987721393.

It is an arithmetic number, because the mean of its divisors is an integer number (60929877213750).

Almost surely, 2^{231533533412231} is an apocalyptic number.

231533533412231 is a deficient number, since it is larger than the sum of its proper divisors (12185975442769).

231533533412231 is a wasteful number, since it uses less digits than its factorization.

231533533412231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12185975442768.

The product of its digits is 583200, while the sum is 41.

Adding to 231533533412231 its reverse (132214335335132), we get a palindrome (363747868747363).

The spelling of 231533533412231 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, five hundred thirty-three million, four hundred twelve thousand, two hundred thirty-one".