213180181 has 2 divisors, whose sum is σ = 213180182. Its totient is φ = 213180180.

The previous prime is 213180167. The next prime is 213180217. The reversal of 213180181 is 181081312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135140625 + 78039556 = 11625^2 + 8834^2 .

It is a cyclic number.

It is not a de Polignac number, because 213180181 - 2⁹ = 213179669 is a prime.

It is a super-2 number, since 2×213180181² = 90891579142385522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213180161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106590090 + 106590091.

It is an arithmetic number, because the mean of its divisors is an integer number (106590091).

Almost surely, 2^213180181 is an apocalyptic number.

It is an amenable number.

213180181 is a deficient number, since it is larger than the sum of its proper divisors (1).

213180181 is an equidigital number, since it uses as much as digits as its factorization.

213180181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 213180181 is about 14600.6911137795. The cubic root of 213180181 is about 597.3776116451.

The spelling of 213180181 in words is "two hundred thirteen million, one hundred eighty thousand, one hundred eighty-one".