231534005354221 has 4 divisors (see below), whose sum is σ = 232456451590944. Its totient is φ = 230611559117500.

The previous prime is 231534005354173. The next prime is 231534005354237. The reversal of 231534005354221 is 122453500435132.

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 231534005354221 - 2⁹ = 231534005353709 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 (231534005354251) 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, 461223117985 + ... + 461223118486.

It is an arithmetic number, because the mean of its divisors is an integer number (58114112897736).

Almost surely, 2^{231534005354221} is an apocalyptic number.

It is an amenable number.

231534005354221 is a deficient number, since it is larger than the sum of its proper divisors (922446236723).

231534005354221 is an equidigital number, since it uses as much as digits as its factorization.

231534005354221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922446236722.

The product of its (nonzero) digits is 432000, while the sum is 40.

Adding to 231534005354221 its reverse (122453500435132), we get a palindrome (353987505789353).

The spelling of 231534005354221 in words is "two hundred thirty-one trillion, five hundred thirty-four billion, five million, three hundred fifty-four thousand, two hundred twenty-one".