221443681404 has 96 divisors (see below), whose sum is σ = 599280643584. Its totient is φ = 62975461120.

The previous prime is 221443681399. The next prime is 221443681411. The reversal of 221443681404 is 404186344122.

It is a super-2 number, since 2×221443681404² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 527199 + ... + 849014.

It is an arithmetic number, because the mean of its divisors is an integer number (6242506704).

Almost surely, 2^221443681404 is an apocalyptic number.

It is an amenable number.

221443681404 is an abundant number, since it is smaller than the sum of its proper divisors (377836962180).

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

221443681404 is a wasteful number, since it uses less digits than its factorization.

221443681404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376307 (or 1376305 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 39.

The spelling of 221443681404 in words is "two hundred twenty-one billion, four hundred forty-three million, six hundred eighty-one thousand, four hundred four".