221655700065731 has 8 divisors (see below), whose sum is σ = 222162358623744. Its totient is φ = 221149069918920.

The previous prime is 221655700065703. The next prime is 221655700065749. The reversal of 221655700065731 is 137560007556122.

221655700065731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221655700065731 - 2²⁶ = 221655632956867 is a prime.

It is a super-2 number, since 2×221655700065731² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221655700065731.

It is not an unprimeable number, because it can be changed into a prime (221655700065931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8557850 + ... + 22727696.

It is an arithmetic number, because the mean of its divisors is an integer number (27770294827968).

Almost surely, 2^{221655700065731} is an apocalyptic number.

221655700065731 is a deficient number, since it is larger than the sum of its proper divisors (506658558013).

221655700065731 is a wasteful number, since it uses less digits than its factorization.

221655700065731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14205601.

The product of its (nonzero) digits is 2646000, while the sum is 50.

The spelling of 221655700065731 in words is "two hundred twenty-one trillion, six hundred fifty-five billion, seven hundred million, sixty-five thousand, seven hundred thirty-one".