221422004506644 has 72 divisors (see below), whose sum is σ = 558574070056128. Its totient is φ = 68217305569920.

The previous prime is 221422004506643. The next prime is 221422004506673. The reversal of 221422004506644 is 446605400224122.

It is a junction number, because it is equal to n+sod(n) for n = 221422004506596 and 221422004506605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422004506643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 623153032 + ... + 623508255.

It is an arithmetic number, because the mean of its divisors is an integer number (7757973195224).

Almost surely, 2^{221422004506644} is an apocalyptic number.

It is an amenable number.

221422004506644 is an abundant number, since it is smaller than the sum of its proper divisors (337152065549484).

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

221422004506644 is a wasteful number, since it uses less digits than its factorization.

221422004506644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246661373 (or 1246661352 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 42.

The spelling of 221422004506644 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, four million, five hundred six thousand, six hundred forty-four".