4221380191 has 4 divisors (see below), whose sum is σ = 4824434512. Its totient is φ = 3618325872.

The previous prime is 4221380171. The next prime is 4221380201. The reversal of 4221380191 is 1910831224.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4221380191 - 2²⁷ = 4087162463 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 (4221380161) 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, 301527150 + ... + 301527163.

It is an arithmetic number, because the mean of its divisors is an integer number (1206108628).

Almost surely, 2^4221380191 is an apocalyptic number.

4221380191 is a deficient number, since it is larger than the sum of its proper divisors (603054321).

4221380191 is an equidigital number, since it uses as much as digits as its factorization.

4221380191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603054320.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 4221380191 is about 64972.1493487787. The cubic root of 4221380191 is about 1616.1617447847.

The spelling of 4221380191 in words is "four billion, two hundred twenty-one million, three hundred eighty thousand, one hundred ninety-one".