212470561 has 2 divisors, whose sum is σ = 212470562. Its totient is φ = 212470560.

The previous prime is 212470543. The next prime is 212470571. The reversal of 212470561 is 165074212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202891536 + 9579025 = 14244^2 + 3095^2 .

It is a cyclic number.

It is not a de Polignac number, because 212470561 - 2¹⁷ = 212339489 is a prime.

It is not a weakly prime, because it can be changed into another prime (212470571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106235280 + 106235281.

It is an arithmetic number, because the mean of its divisors is an integer number (106235281).

Almost surely, 2^212470561 is an apocalyptic number.

It is an amenable number.

212470561 is a deficient number, since it is larger than the sum of its proper divisors (1).

212470561 is an equidigital number, since it uses as much as digits as its factorization.

212470561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 212470561 is about 14576.3699527694. The cubic root of 212470561 is about 596.7140378662.

The spelling of 212470561 in words is "two hundred twelve million, four hundred seventy thousand, five hundred sixty-one".