221214315444 has 24 divisors (see below), whose sum is σ = 516795463968. Its totient is φ = 73648286880.

The previous prime is 221214315391. The next prime is 221214315451. The reversal of 221214315444 is 444513412122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11217022 + ... + 11236725.

It is an arithmetic number, because the mean of its divisors is an integer number (21533144332).

Almost surely, 2^221214315444 is an apocalyptic number.

It is an amenable number.

221214315444 is an abundant number, since it is smaller than the sum of its proper divisors (295581148524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221214315444 is a wasteful number, since it uses less digits than its factorization.

221214315444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22454575 (or 22454573 counting only the distinct ones).

The product of its digits is 30720, while the sum is 33.

Adding to 221214315444 its reverse (444513412122), we get a palindrome (665727727566).

The spelling of 221214315444 in words is "two hundred twenty-one billion, two hundred fourteen million, three hundred fifteen thousand, four hundred forty-four".