211242213 has 48 divisors (see below), whose sum is σ = 385746816. Its totient is φ = 108397440.

The previous prime is 211242193. The next prime is 211242233. The reversal of 211242213 is 312242112.

It is a happy number.

211242213 is a `hidden beast` number, since 211 + 242 + 213 = 666.

It is an interprime number because it is at equal distance from previous prime (211242193) and next prime (211242233).

It is not a de Polignac number, because 211242213 - 2⁸ = 211241957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211242233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26818 + ... + 33788.

It is an arithmetic number, because the mean of its divisors is an integer number (8036392).

Almost surely, 2^211242213 is an apocalyptic number.

It is an amenable number.

211242213 is a deficient number, since it is larger than the sum of its proper divisors (174504603).

211242213 is a wasteful number, since it uses less digits than its factorization.

211242213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034 (or 7031 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 211242213 is about 14534.1739703363. The cubic root of 211242213 is about 595.5618946425.

Adding to 211242213 its reverse (312242112), we get a palindrome (523484325).

The spelling of 211242213 in words is "two hundred eleven million, two hundred forty-two thousand, two hundred thirteen".