212052161 has 2 divisors, whose sum is σ = 212052162. Its totient is φ = 212052160.

The previous prime is 212052133. The next prime is 212052173. The reversal of 212052161 is 161250212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145057936 + 66994225 = 12044^2 + 8185^2 .

It is a cyclic number.

It is not a de Polignac number, because 212052161 - 2⁶ = 212052097 is a prime.

It is a super-2 number, since 2×212052161² = 89932237969539842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212057161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106026080 + 106026081.

It is an arithmetic number, because the mean of its divisors is an integer number (106026081).

Almost surely, 2^212052161 is an apocalyptic number.

It is an amenable number.

212052161 is a deficient number, since it is larger than the sum of its proper divisors (1).

212052161 is an equidigital number, since it uses as much as digits as its factorization.

212052161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 212052161 is about 14562.0108844898. The cubic root of 212052161 is about 596.3220946041.

The spelling of 212052161 in words is "two hundred twelve million, fifty-two thousand, one hundred sixty-one".