221478863418707 has 8 divisors (see below), whose sum is σ = 223549466641200. Its totient is φ = 219408273294624.

The previous prime is 221478863418671. The next prime is 221478863418727. The reversal of 221478863418707 is 707814368874122.

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 221478863418707 - 2²⁰ = 221478862370131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221478863418727) 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, 32521769 + ... + 38737877.

It is an arithmetic number, because the mean of its divisors is an integer number (27943683330150).

Almost surely, 2^{221478863418707} is an apocalyptic number.

221478863418707 is a deficient number, since it is larger than the sum of its proper divisors (2070603222493).

221478863418707 is a wasteful number, since it uses less digits than its factorization.

221478863418707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6549205.

The product of its (nonzero) digits is 202309632, while the sum is 68.

The spelling of 221478863418707 in words is "two hundred twenty-one trillion, four hundred seventy-eight billion, eight hundred sixty-three million, four hundred eighteen thousand, seven hundred seven".