231021433433 has 4 divisors (see below), whose sum is σ = 264024495360. Its totient is φ = 198018371508.

The previous prime is 231021433373. The next prime is 231021433451. The reversal of 231021433433 is 334334120132.

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 231021433433 - 2⁸ = 231021433177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231021433396 and 231021433405.

It is not an unprimeable number, because it can be changed into a prime (231021438433) 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, 16501530953 + ... + 16501530966.

It is an arithmetic number, because the mean of its divisors is an integer number (66006123840).

Almost surely, 2^231021433433 is an apocalyptic number.

It is an amenable number.

231021433433 is a deficient number, since it is larger than the sum of its proper divisors (33003061927).

231021433433 is an equidigital number, since it uses as much as digits as its factorization.

231021433433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33003061926.

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 231021433433 its reverse (334334120132), we get a palindrome (565355553565).

The spelling of 231021433433 in words is "two hundred thirty-one billion, twenty-one million, four hundred thirty-three thousand, four hundred thirty-three".