220671172 has 12 divisors (see below), whose sum is σ = 386353660. Its totient is φ = 110284416.

The previous prime is 220671167. The next prime is 220671173. The reversal of 220671172 is 271176022.

It can be written as a sum of positive squares in 2 ways, for example, as 126697536 + 93973636 = 11256^2 + 9694^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 220671172.

It is not an unprimeable number, because it can be changed into a prime (220671173) 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 3 ways as a sum of consecutive naturals, for example, 2097 + ... + 21112.

Almost surely, 2^220671172 is an apocalyptic number.

It is an amenable number.

220671172 is a deficient number, since it is larger than the sum of its proper divisors (165682488).

220671172 is a wasteful number, since it uses less digits than its factorization.

220671172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25590 (or 25588 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 220671172 is about 14855.0049478282. The cubic root of 220671172 is about 604.2943501922.

The spelling of 220671172 in words is "two hundred twenty million, six hundred seventy-one thousand, one hundred seventy-two".