221160905 has 16 divisors (see below), whose sum is σ = 321148800. Its totient is φ = 142732032.

The previous prime is 221160883. The next prime is 221160923. The reversal of 221160905 is 509061122.

It is a cyclic number.

It is not a de Polignac number, because 221160905 - 2¹² = 221156809 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185255 + ... + 186444.

It is an arithmetic number, because the mean of its divisors is an integer number (20071800).

Almost surely, 2^221160905 is an apocalyptic number.

It is an amenable number.

221160905 is a deficient number, since it is larger than the sum of its proper divisors (99987895).

221160905 is a wasteful number, since it uses less digits than its factorization.

221160905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371728.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 221160905 is about 14871.4795834174. The cubic root of 221160905 is about 604.7410544057.

The spelling of 221160905 in words is "two hundred twenty-one million, one hundred sixty thousand, nine hundred five".