221254345 has 16 divisors (see below), whose sum is σ = 289380672. Its totient is φ = 161415360.

The previous prime is 221254331. The next prime is 221254417. The reversal of 221254345 is 543452122.

It is a de Polignac number, because none of the positive numbers 2^k-221254345 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15111 + ... + 25900.

It is an arithmetic number, because the mean of its divisors is an integer number (18086292).

Almost surely, 2^221254345 is an apocalyptic number.

It is an amenable number.

221254345 is a deficient number, since it is larger than the sum of its proper divisors (68126327).

221254345 is a wasteful number, since it uses less digits than its factorization.

221254345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41112.

The product of its digits is 9600, while the sum is 28.

The square root of 221254345 is about 14874.6208355037. The cubic root of 221254345 is about 604.8262096730.

The spelling of 221254345 in words is "two hundred twenty-one million, two hundred fifty-four thousand, three hundred forty-five".