221448882829 has 4 divisors (see below), whose sum is σ = 221452306560. Its totient is φ = 221445459100.

The previous prime is 221448882791. The next prime is 221448882887. The reversal of 221448882829 is 928288844122.

It is a happy number.

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 221448882829 - 2²⁹ = 220912011917 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 (221448882899) 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, 1612939 + ... + 1744840.

It is an arithmetic number, because the mean of its divisors is an integer number (55363076640).

Almost surely, 2^221448882829 is an apocalyptic number.

It is an amenable number.

221448882829 is a deficient number, since it is larger than the sum of its proper divisors (3423731).

221448882829 is an equidigital number, since it uses as much as digits as its factorization.

221448882829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3423730.

The product of its digits is 9437184, while the sum is 58.

The spelling of 221448882829 in words is "two hundred twenty-one billion, four hundred forty-eight million, eight hundred eighty-two thousand, eight hundred twenty-nine".