212342261 has 2 divisors, whose sum is σ = 212342262. Its totient is φ = 212342260.

The previous prime is 212342243. The next prime is 212342293. The reversal of 212342261 is 162243212.

It is a happy number.

212342261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210424036 + 1918225 = 14506^2 + 1385^2 .

It is a cyclic number.

It is not a de Polignac number, because 212342261 - 2⁶ = 212342197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212342201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106171130 + 106171131.

It is an arithmetic number, because the mean of its divisors is an integer number (106171131).

Almost surely, 2^212342261 is an apocalyptic number.

It is an amenable number.

212342261 is a deficient number, since it is larger than the sum of its proper divisors (1).

212342261 is an equidigital number, since it uses as much as digits as its factorization.

212342261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 212342261 is about 14571.9683296389. The cubic root of 212342261 is about 596.5939054178.

Adding to 212342261 its reverse (162243212), we get a palindrome (374585473).

The spelling of 212342261 in words is "two hundred twelve million, three hundred forty-two thousand, two hundred sixty-one".