221364345 has 32 divisors (see below), whose sum is σ = 375137280. Its totient is φ = 111153600.

The previous prime is 221364343. The next prime is 221364373. The reversal of 221364345 is 543463122.

It is not a de Polignac number, because 221364345 - 2¹ = 221364343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221364343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45270 + ... + 49920.

It is an arithmetic number, because the mean of its divisors is an integer number (11723040).

Almost surely, 2^221364345 is an apocalyptic number.

It is an amenable number.

221364345 is a deficient number, since it is larger than the sum of its proper divisors (153772935).

221364345 is a wasteful number, since it uses less digits than its factorization.

221364345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4845.

The product of its digits is 17280, while the sum is 30.

The square root of 221364345 is about 14878.3179492845. The cubic root of 221364345 is about 604.9264259505.

The spelling of 221364345 in words is "two hundred twenty-one million, three hundred sixty-four thousand, three hundred forty-five".