2221973 has 4 divisors (see below), whose sum is σ = 2392908. Its totient is φ = 2051040.

The previous prime is 2221969. The next prime is 2221981. The reversal of 2221973 is 3791222.

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

It can be written as a sum of positive squares in 2 ways, for example, as 786769 + 1435204 = 887^2 + 1198^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221973 - 2² = 2221969 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 (2221943) 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, 85448 + ... + 85473.

It is an arithmetic number, because the mean of its divisors is an integer number (598227).

2^2221973 is an apocalyptic number.

It is an amenable number.

2221973 is a deficient number, since it is larger than the sum of its proper divisors (170935).

2221973 is a wasteful number, since it uses less digits than its factorization.

2221973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170934.

The product of its digits is 1512, while the sum is 26.

The square root of 2221973 is about 1490.6283909815. The cubic root of 2221973 is about 130.4907094965.

The spelling of 2221973 in words is "two million, two hundred twenty-one thousand, nine hundred seventy-three".