213331361 has 2 divisors, whose sum is σ = 213331362. Its totient is φ = 213331360.

The previous prime is 213331289. The next prime is 213331369. The reversal of 213331361 is 163133312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189750625 + 23580736 = 13775^2 + 4856^2 .

It is a cyclic number.

It is not a de Polignac number, because 213331361 - 2¹⁴ = 213314977 is a prime.

It is a super-2 number, since 2×213331361² = 91020539172224642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213331369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106665680 + 106665681.

It is an arithmetic number, because the mean of its divisors is an integer number (106665681).

Almost surely, 2^213331361 is an apocalyptic number.

It is an amenable number.

213331361 is a deficient number, since it is larger than the sum of its proper divisors (1).

213331361 is an equidigital number, since it uses as much as digits as its factorization.

213331361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 23.

The square root of 213331361 is about 14605.8673484323. The cubic root of 213331361 is about 597.5187914470.

Adding to 213331361 its reverse (163133312), we get a palindrome (376464673).

The spelling of 213331361 in words is "two hundred thirteen million, three hundred thirty-one thousand, three hundred sixty-one".