212907161 has 2 divisors, whose sum is σ = 212907162. Its totient is φ = 212907160.

The previous prime is 212907151. The next prime is 212907181. The reversal of 212907161 is 161709212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154231561 + 58675600 = 12419^2 + 7660^2 .

It is a cyclic number.

It is not a de Polignac number, because 212907161 - 2²² = 208712857 is a prime.

It is not a weakly prime, because it can be changed into another prime (212907151) 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, 106453580 + 106453581.

It is an arithmetic number, because the mean of its divisors is an integer number (106453581).

Almost surely, 2^212907161 is an apocalyptic number.

It is an amenable number.

212907161 is a deficient number, since it is larger than the sum of its proper divisors (1).

212907161 is an equidigital number, since it uses as much as digits as its factorization.

212907161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 212907161 is about 14591.3385609409. The cubic root of 212907161 is about 597.1224820640.

The spelling of 212907161 in words is "two hundred twelve million, nine hundred seven thousand, one hundred sixty-one".