221000386 has 8 divisors (see below), whose sum is σ = 332018064. Its totient is φ = 110327700.

The previous prime is 221000383. The next prime is 221000393. The reversal of 221000386 is 683000122.

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

It is a super-2 number, since 2×221000386² = 97682341224297992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221000383) 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, 84640 + ... + 87211.

It is an arithmetic number, because the mean of its divisors is an integer number (41502258).

Almost surely, 2^221000386 is an apocalyptic number.

221000386 is a deficient number, since it is larger than the sum of its proper divisors (111017678).

221000386 is a wasteful number, since it uses less digits than its factorization.

221000386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172496.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 221000386 is about 14866.0817298978. The cubic root of 221000386 is about 604.5947115972.

The spelling of 221000386 in words is "two hundred twenty-one million, three hundred eighty-six", and thus it is an aban number.