221422004506646 has 32 divisors (see below), whose sum is σ = 359626419634176. Its totient is φ = 101944880532000.

The previous prime is 221422004506643. The next prime is 221422004506673. The reversal of 221422004506646 is 646605400224122.

It is a junction number, because it is equal to n+sod(n) for n = 221422004506597 and 221422004506606.

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 15 ways as a sum of consecutive naturals, for example, 406206425 + ... + 406751156.

It is an arithmetic number, because the mean of its divisors is an integer number (11238325613568).

Almost surely, 2^{221422004506646} is an apocalyptic number.

221422004506646 is a deficient number, since it is larger than the sum of its proper divisors (138204415127530).

221422004506646 is a wasteful number, since it uses less digits than its factorization.

221422004506646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812957828.

The product of its (nonzero) digits is 1105920, while the sum is 44.

The spelling of 221422004506646 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, four million, five hundred six thousand, six hundred forty-six".