213461161 has 2 divisors, whose sum is σ = 213461162. Its totient is φ = 213461160.

The previous prime is 213461153. The next prime is 213461167. The reversal of 213461161 is 161164312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148352400 + 65108761 = 12180^2 + 8069^2 .

It is a cyclic number.

It is not a de Polignac number, because 213461161 - 2³ = 213461153 is a prime.

It is equal to p_11782060 and since 213461161 and 11782060 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (213461167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106730580 + 106730581.

It is an arithmetic number, because the mean of its divisors is an integer number (106730581).

Almost surely, 2^213461161 is an apocalyptic number.

It is an amenable number.

213461161 is a deficient number, since it is larger than the sum of its proper divisors (1).

213461161 is an equidigital number, since it uses as much as digits as its factorization.

213461161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 213461161 is about 14610.3100925340. The cubic root of 213461161 is about 597.6399522774.

The spelling of 213461161 in words is "two hundred thirteen million, four hundred sixty-one thousand, one hundred sixty-one".