221452540047169 has 4 divisors (see below), whose sum is σ = 221455764198144. Its totient is φ = 221449315896196.

The previous prime is 221452540047139. The next prime is 221452540047173. The reversal of 221452540047169 is 961740045254122.

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 221452540047169 - 2⁷ = 221452540047041 is a prime.

It is a super-2 number, since 2×221452540047169² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221452540047139) 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, 1611972457 + ... + 1612109830.

It is an arithmetic number, because the mean of its divisors is an integer number (55363941049536).

Almost surely, 2^{221452540047169} is an apocalyptic number.

It is an amenable number.

221452540047169 is a deficient number, since it is larger than the sum of its proper divisors (3224150975).

221452540047169 is an equidigital number, since it uses as much as digits as its factorization.

221452540047169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224150974.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 221452540047169 in words is "two hundred twenty-one trillion, four hundred fifty-two billion, five hundred forty million, forty-seven thousand, one hundred sixty-nine".