212434181 has 2 divisors, whose sum is σ = 212434182. Its totient is φ = 212434180.

The previous prime is 212434169. The next prime is 212434207. The reversal of 212434181 is 181434212.

212434181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (212434207) can be obtained adding 212434181 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142444225 + 69989956 = 11935^2 + 8366^2 .

It is a cyclic number.

It is not a de Polignac number, because 212434181 - 2²⁶ = 145325317 is a prime.

It is a super-2 number, since 2×212434181² = 90256562514281522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212434181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212434111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106217090 + 106217091.

It is an arithmetic number, because the mean of its divisors is an integer number (106217091).

Almost surely, 2^212434181 is an apocalyptic number.

It is an amenable number.

212434181 is a deficient number, since it is larger than the sum of its proper divisors (1).

212434181 is an equidigital number, since it uses as much as digits as its factorization.

212434181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 26.

The square root of 212434181 is about 14575.1219891979. The cubic root of 212434181 is about 596.6799787229.

Adding to 212434181 its reverse (181434212), we get a palindrome (393868393).

The spelling of 212434181 in words is "two hundred twelve million, four hundred thirty-four thousand, one hundred eighty-one".