231242542204533 has 4 divisors (see below), whose sum is σ = 308323389606048. Its totient is φ = 154161694803020.

The previous prime is 231242542204493. The next prime is 231242542204559. The reversal of 231242542204533 is 335402245242132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231242542204533 - 2²⁰ = 231242541155957 is a prime.

It is a super-2 number, since 2×231242542204533² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231242542204033) 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 3 ways as a sum of consecutive naturals, for example, 38540423700753 + ... + 38540423700758.

It is an arithmetic number, because the mean of its divisors is an integer number (77080847401512).

Almost surely, 2^{231242542204533} is an apocalyptic number.

It is an amenable number.

231242542204533 is a deficient number, since it is larger than the sum of its proper divisors (77080847401515).

231242542204533 is an equidigital number, since it uses as much as digits as its factorization.

231242542204533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77080847401514.

The product of its (nonzero) digits is 1382400, while the sum is 42.

Adding to 231242542204533 its reverse (335402245242132), we get a palindrome (566644787446665).

The spelling of 231242542204533 in words is "two hundred thirty-one trillion, two hundred forty-two billion, five hundred forty-two million, two hundred four thousand, five hundred thirty-three".