2212391 has 2 divisors, whose sum is σ = 2212392. Its totient is φ = 2212390.

The previous prime is 2212387. The next prime is 2212421. The reversal of 2212391 is 1932122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2212391 - 2² = 2212387 is a prime.

It is equal to p₁₆₃₅₃₂ and since 2212391 and 163532 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2212321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106195 + 1106196.

It is an arithmetic number, because the mean of its divisors is an integer number (1106196).

2^2212391 is an apocalyptic number.

2212391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212391 is an equidigital number, since it uses as much as digits as its factorization.

2212391 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 2212391 is about 1487.4108376639. The cubic root of 2212391 is about 130.3028638831.

The spelling of 2212391 in words is "two million, two hundred twelve thousand, three hundred ninety-one".