221534404133005 has 4 divisors (see below), whose sum is σ = 265841284959612. Its totient is φ = 177227523306400.

The previous prime is 221534404132997. The next prime is 221534404133041. The reversal of 221534404133005 is 500331404435122.

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 24639092033284 + 196895312099721 = 4963778^2 + 14031939^2 .

It is not a de Polignac number, because 221534404133005 - 2³ = 221534404132997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22153440413296 + ... + 22153440413305.

It is an arithmetic number, because the mean of its divisors is an integer number (66460321239903).

Almost surely, 2^{221534404133005} is an apocalyptic number.

It is an amenable number.

221534404133005 is a deficient number, since it is larger than the sum of its proper divisors (44306880826607).

221534404133005 is an equidigital number, since it uses as much as digits as its factorization.

221534404133005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44306880826606.

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 221534404133005 its reverse (500331404435122), we get a palindrome (721865808568127).

The spelling of 221534404133005 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred four million, one hundred thirty-three thousand, five".