220206387 has 8 divisors (see below), whose sum is σ = 297146304. Its totient is φ = 145035368.

The previous prime is 220206373. The next prime is 220206391. The reversal of 220206387 is 783602022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220206387 - 2⁶ = 220206323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220206187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441933 + ... + 442430.

It is an arithmetic number, because the mean of its divisors is an integer number (37143288).

Almost surely, 2^220206387 is an apocalyptic number.

220206387 is a deficient number, since it is larger than the sum of its proper divisors (76939917).

220206387 is an equidigital number, since it uses as much as digits as its factorization.

220206387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884449.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 220206387 is about 14839.3526476056. The cubic root of 220206387 is about 603.8697903240.

The spelling of 220206387 in words is "two hundred twenty million, two hundred six thousand, three hundred eighty-seven".