221545355674201 has 8 divisors (see below), whose sum is σ = 238591496251584. Its totient is φ = 204499813688400.

The previous prime is 221545355674109. The next prime is 221545355674207. The reversal of 221545355674201 is 102476553545122.

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 221545355674201 - 2¹³ = 221545355666009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221545355674207) 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, 148879051 + ... + 150359776.

It is an arithmetic number, because the mean of its divisors is an integer number (29823937031448).

Almost surely, 2^{221545355674201} is an apocalyptic number.

It is an amenable number.

221545355674201 is a deficient number, since it is larger than the sum of its proper divisors (17046140577383).

221545355674201 is a wasteful number, since it uses less digits than its factorization.

221545355674201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299295791.

The product of its (nonzero) digits is 10080000, while the sum is 52.

The spelling of 221545355674201 in words is "two hundred twenty-one trillion, five hundred forty-five billion, three hundred fifty-five million, six hundred seventy-four thousand, two hundred one".