221656430214670 has 128 divisors (see below), whose sum is σ = 457018026024960. Its totient is φ = 76615671242880.

The previous prime is 221656430214581. The next prime is 221656430214679. The reversal of 221656430214670 is 76412034656122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221656430214679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4036033471 + ... + 4036088389.

It is an arithmetic number, because the mean of its divisors is an integer number (3570453328320).

Almost surely, 2^{221656430214670} is an apocalyptic number.

221656430214670 is an abundant number, since it is smaller than the sum of its proper divisors (235361595810290).

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

221656430214670 is a wasteful number, since it uses less digits than its factorization.

221656430214670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64910.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 221656430214670 in words is "two hundred twenty-one trillion, six hundred fifty-six billion, four hundred thirty million, two hundred fourteen thousand, six hundred seventy".