2291213 has 2 divisors, whose sum is σ = 2291214. Its totient is φ = 2291212.

The previous prime is 2291197. The next prime is 2291227. The reversal of 2291213 is 3121922.

2291213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2271049 + 20164 = 1507^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 2291213 - 2⁴ = 2291197 is a prime.

It is a super-2 number, since 2×2291213² = 10499314022738, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2291273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1145606 + 1145607.

It is an arithmetic number, because the mean of its divisors is an integer number (1145607).

2^2291213 is an apocalyptic number.

It is an amenable number.

2291213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2291213 is an equidigital number, since it uses as much as digits as its factorization.

2291213 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2291213 is about 1513.6753284638. The cubic root of 2291213 is about 131.8322977425.

The spelling of 2291213 in words is "two million, two hundred ninety-one thousand, two hundred thirteen".