221556447273073 has 8 divisors (see below), whose sum is σ = 241698155514336. Its totient is φ = 201414774537600.

The previous prime is 221556447273023. The next prime is 221556447273179. The reversal of 221556447273073 is 370372744655122.

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 221556447273073 - 2²⁹ = 221555910402161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221556447272999 and 221556447273017.

It is not an unprimeable number, because it can be changed into a prime (221556447273023) 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, 5132065 + ... + 21666817.

It is an arithmetic number, because the mean of its divisors is an integer number (30212269439292).

Almost surely, 2^{221556447273073} is an apocalyptic number.

It is an amenable number.

221556447273073 is a deficient number, since it is larger than the sum of its proper divisors (20141708241263).

221556447273073 is a wasteful number, since it uses less digits than its factorization.

221556447273073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17752895.

The product of its (nonzero) digits is 59270400, while the sum is 58.

The spelling of 221556447273073 in words is "two hundred twenty-one trillion, five hundred fifty-six billion, four hundred forty-seven million, two hundred seventy-three thousand, seventy-three".