2973221 has 2 divisors, whose sum is σ = 2973222. Its totient is φ = 2973220.

The previous prime is 2973199. The next prime is 2973239. The reversal of 2973221 is 1223792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2070721 + 902500 = 1439^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 2973221 - 2¹⁰ = 2972197 is a prime.

It is a super-2 number, since 2×2973221² = 17680086229682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2973251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1486610 + 1486611.

It is an arithmetic number, because the mean of its divisors is an integer number (1486611).

2^2973221 is an apocalyptic number.

It is an amenable number.

2973221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2973221 is an equidigital number, since it uses as much as digits as its factorization.

2973221 is an evil number, because the sum of its binary digits is even.

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

The square root of 2973221 is about 1724.3030476108. The cubic root of 2973221 is about 143.7945404512.

The spelling of 2973221 in words is "two million, nine hundred seventy-three thousand, two hundred twenty-one".