2221000391 has 8 divisors (see below), whose sum is σ = 2270142720. Its totient is φ = 2172383928.

The previous prime is 2221000387. The next prime is 2221000393. The reversal of 2221000391 is 1930001222.

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 2221000391 - 2² = 2221000387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221000393) 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, 122921 + ... + 139826.

It is an arithmetic number, because the mean of its divisors is an integer number (283767840).

Almost surely, 2^2221000391 is an apocalyptic number.

2221000391 is a deficient number, since it is larger than the sum of its proper divisors (49142329).

2221000391 is a wasteful number, since it uses less digits than its factorization.

2221000391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262933.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2221000391 is about 47127.4908201147. The cubic root of 2221000391 is about 1304.7166711675.

The spelling of 2221000391 in words is "two billion, two hundred twenty-one million, three hundred ninety-one", and thus it is an aban number.