213282761 has 2 divisors, whose sum is σ = 213282762. Its totient is φ = 213282760.

The previous prime is 213282739. The next prime is 213282781. The reversal of 213282761 is 167282312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143041600 + 70241161 = 11960^2 + 8381^2 .

It is a cyclic number.

It is not a de Polignac number, because 213282761 - 2¹⁸ = 213020617 is a prime.

It is a super-2 number, since 2×213282761² = 90979072279566242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213282701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106641380 + 106641381.

It is an arithmetic number, because the mean of its divisors is an integer number (106641381).

Almost surely, 2^213282761 is an apocalyptic number.

It is an amenable number.

213282761 is a deficient number, since it is larger than the sum of its proper divisors (1).

213282761 is an equidigital number, since it uses as much as digits as its factorization.

213282761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 213282761 is about 14604.2035387076. The cubic root of 213282761 is about 597.4734134981.

The spelling of 213282761 in words is "two hundred thirteen million, two hundred eighty-two thousand, seven hundred sixty-one".