221665370470332 has 24 divisors (see below), whose sum is σ = 517242539654400. Its totient is φ = 73885122267696.

The previous prime is 221665370470319. The next prime is 221665370470339. The reversal of 221665370470332 is 233074073566122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221665370470339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416542482 + ... + 417074297.

It is an arithmetic number, because the mean of its divisors is an integer number (21551772485600).

Almost surely, 2^{221665370470332} is an apocalyptic number.

It is an amenable number.

221665370470332 is an abundant number, since it is smaller than the sum of its proper divisors (295577169184068).

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

221665370470332 is a wasteful number, since it uses less digits than its factorization.

221665370470332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833638945 (or 833638943 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 51.

The spelling of 221665370470332 in words is "two hundred twenty-one trillion, six hundred sixty-five billion, three hundred seventy million, four hundred seventy thousand, three hundred thirty-two".