221145118 has 16 divisors (see below), whose sum is σ = 334303200. Its totient is φ = 109714176.

The previous prime is 221145109. The next prime is 221145137. The reversal of 221145118 is 811541122.

221145118 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221145092 and 221145101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235546 + ... + 236482.

It is an arithmetic number, because the mean of its divisors is an integer number (20893950).

Almost surely, 2^221145118 is an apocalyptic number.

221145118 is a deficient number, since it is larger than the sum of its proper divisors (113158082).

221145118 is a wasteful number, since it uses less digits than its factorization.

221145118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731.

The product of its digits is 640, while the sum is 25.

The square root of 221145118 is about 14870.9487928646. The cubic root of 221145118 is about 604.7266647705.

The spelling of 221145118 in words is "two hundred twenty-one million, one hundred forty-five thousand, one hundred eighteen".