220786971 has 8 divisors (see below), whose sum is σ = 296988240. Its totient is φ = 145888512.

The previous prime is 220786963. The next prime is 220786981. The reversal of 220786971 is 179687022.

220786971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 220786971 - 2³ = 220786963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220786961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325306 + ... + 325983.

It is an arithmetic number, because the mean of its divisors is an integer number (37123530).

Almost surely, 2^220786971 is an apocalyptic number.

220786971 is a deficient number, since it is larger than the sum of its proper divisors (76201269).

220786971 is a wasteful number, since it uses less digits than its factorization.

220786971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651405.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 220786971 is about 14858.9020792251. The cubic root of 220786971 is about 604.4000345069.

The spelling of 220786971 in words is "two hundred twenty million, seven hundred eighty-six thousand, nine hundred seventy-one".