220866097 has 4 divisors (see below), whose sum is σ = 222022656. Its totient is φ = 219709540.

The previous prime is 220866077. The next prime is 220866109. The reversal of 220866097 is 790668022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220866097 - 2¹⁵ = 220833329 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220866007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577993 + ... + 578374.

It is an arithmetic number, because the mean of its divisors is an integer number (55505664).

Almost surely, 2^220866097 is an apocalyptic number.

It is an amenable number.

220866097 is a deficient number, since it is larger than the sum of its proper divisors (1156559).

220866097 is a wasteful number, since it uses less digits than its factorization.

220866097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156558.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 220866097 is about 14861.5644196700. The cubic root of 220866097 is about 604.4722278448.

The spelling of 220866097 in words is "two hundred twenty million, eight hundred sixty-six thousand, ninety-seven".