212053561 has 2 divisors, whose sum is σ = 212053562. Its totient is φ = 212053560.

The previous prime is 212053531. The next prime is 212053577. The reversal of 212053561 is 165350212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211527936 + 525625 = 14544^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 212053561 - 2¹⁵ = 212020793 is a prime.

It is not a weakly prime, because it can be changed into another prime (212053531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106026780 + 106026781.

It is an arithmetic number, because the mean of its divisors is an integer number (106026781).

Almost surely, 2^212053561 is an apocalyptic number.

It is an amenable number.

212053561 is a deficient number, since it is larger than the sum of its proper divisors (1).

212053561 is an equidigital number, since it uses as much as digits as its factorization.

212053561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 212053561 is about 14562.0589546946. The cubic root of 212053561 is about 596.3234069370.

The spelling of 212053561 in words is "two hundred twelve million, fifty-three thousand, five hundred sixty-one".