2221319 has 4 divisors (see below), whose sum is σ = 2227560. Its totient is φ = 2215080.

The previous prime is 2221301. The next prime is 2221321. The reversal of 2221319 is 9131222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221319 is a prime.

It is a super-2 number, since 2×2221319² = 9868516199522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221379) 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, 2552 + ... + 3309.

It is an arithmetic number, because the mean of its divisors is an integer number (556890).

2^2221319 is an apocalyptic number.

2221319 is a deficient number, since it is larger than the sum of its proper divisors (6241).

2221319 is an equidigital number, since it uses as much as digits as its factorization.

2221319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6240.

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

The square root of 2221319 is about 1490.4090042669. The cubic root of 2221319 is about 130.4779056658.

Subtracting 2221319 from its reverse (9131222), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 2221319 in words is "two million, two hundred twenty-one thousand, three hundred nineteen".