213412261 has 2 divisors, whose sum is σ = 213412262. Its totient is φ = 213412260.

The previous prime is 213412211. The next prime is 213412273. The reversal of 213412261 is 162214312.

213412261 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., 207187236 + 6225025 = 14394^2 + 2495^2 .

It is a cyclic number.

It is not a de Polignac number, because 213412261 - 2²³ = 205023653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213412211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106706130 + 106706131.

It is an arithmetic number, because the mean of its divisors is an integer number (106706131).

Almost surely, 2^213412261 is an apocalyptic number.

It is an amenable number.

213412261 is a deficient number, since it is larger than the sum of its proper divisors (1).

213412261 is an equidigital number, since it uses as much as digits as its factorization.

213412261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

The square root of 213412261 is about 14608.6365209078. The cubic root of 213412261 is about 597.5943127093.

Adding to 213412261 its reverse (162214312), we get a palindrome (375626573).

The spelling of 213412261 in words is "two hundred thirteen million, four hundred twelve thousand, two hundred sixty-one".