231533531043445 has 4 divisors (see below), whose sum is σ = 277840237252140. Its totient is φ = 185226824834752.

The previous prime is 231533531043439. The next prime is 231533531043469. The reversal of 231533531043445 is 544340135335132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 183635075644804 + 47898455398641 = 13551202^2 + 6920871^2 .

It is a cyclic number.

It is not a de Polignac number, because 231533531043445 - 2⁵ = 231533531043413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231533531043395 and 231533531043404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23153353104340 + ... + 23153353104349.

It is an arithmetic number, because the mean of its divisors is an integer number (69460059313035).

Almost surely, 2^{231533531043445} is an apocalyptic number.

It is an amenable number.

231533531043445 is a deficient number, since it is larger than the sum of its proper divisors (46306706208695).

231533531043445 is an equidigital number, since it uses as much as digits as its factorization.

231533531043445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46306706208694.

The product of its (nonzero) digits is 3888000, while the sum is 46.

Adding to 231533531043445 its reverse (544340135335132), we get a palindrome (775873666378577).

The spelling of 231533531043445 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, five hundred thirty-one million, forty-three thousand, four hundred forty-five".