2221349 has 4 divisors (see below), whose sum is σ = 2392236. Its totient is φ = 2050464.

The previous prime is 2221343. The next prime is 2221379. The reversal of 2221349 is 9431222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9431222 = 2 ⋅4715611.

It can be written as a sum of positive squares in 2 ways, for example, as 1050625 + 1170724 = 1025^2 + 1082^2 .

It is not a de Polignac number, because 2221349 - 2⁴ = 2221333 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 (2221343) 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, 85424 + ... + 85449.

It is an arithmetic number, because the mean of its divisors is an integer number (598059).

2^2221349 is an apocalyptic number.

It is an amenable number.

2221349 is a deficient number, since it is larger than the sum of its proper divisors (170887).

2221349 is a wasteful number, since it uses less digits than its factorization.

2221349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170886.

The product of its digits is 864, while the sum is 23.

The square root of 2221349 is about 1490.4190685844. The cubic root of 2221349 is about 130.4784930525.

The spelling of 2221349 in words is "two million, two hundred twenty-one thousand, three hundred forty-nine".