2219991481 has 4 divisors (see below), whose sum is σ = 2220245392. Its totient is φ = 2219737572.

The previous prime is 2219991469. The next prime is 2219991493. The reversal of 2219991481 is 1841999122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2219991469) and next prime (2219991493).

It is a cyclic number.

It is not a de Polignac number, because 2219991481 - 2¹⁹ = 2219467193 is a prime.

It is a super-2 number, since 2×2219991481² = 9856724351425146722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2219991421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113355 + ... + 131488.

It is an arithmetic number, because the mean of its divisors is an integer number (555061348).

Almost surely, 2^2219991481 is an apocalyptic number.

It is an amenable number.

2219991481 is a deficient number, since it is larger than the sum of its proper divisors (253911).

2219991481 is an equidigital number, since it uses as much as digits as its factorization.

2219991481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253910.

The product of its digits is 93312, while the sum is 46.

The square root of 2219991481 is about 47116.7855546195. The cubic root of 2219991481 is about 1304.5190813678.

The spelling of 2219991481 in words is "two billion, two hundred nineteen million, nine hundred ninety-one thousand, four hundred eighty-one".