220606771 has 12 divisors (see below), whose sum is σ = 279954360. Its totient is φ = 171900960.

The previous prime is 220606769. The next prime is 220606781. The reversal of 220606771 is 177606022.

It is not a de Polignac number, because 220606771 - 2¹ = 220606769 is a prime.

It is a super-2 number, since 2×220606771² = 97334694822092882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220606781) 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 11 ways as a sum of consecutive naturals, for example, 204106 + ... + 205183.

It is an arithmetic number, because the mean of its divisors is an integer number (23329530).

Almost surely, 2^220606771 is an apocalyptic number.

220606771 is a deficient number, since it is larger than the sum of its proper divisors (59347589).

220606771 is a wasteful number, since it uses less digits than its factorization.

220606771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409314 (or 409307 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 220606771 is about 14852.8371363858. The cubic root of 220606771 is about 604.2355584213.

The spelling of 220606771 in words is "two hundred twenty million, six hundred six thousand, seven hundred seventy-one".