201466561 has 2 divisors, whose sum is σ = 201466562. Its totient is φ = 201466560.

The previous prime is 201466537. The next prime is 201466571. The reversal of 201466561 is 165664102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167314225 + 34152336 = 12935^2 + 5844^2 .

It is a cyclic number.

It is not a de Polignac number, because 201466561 - 2⁹ = 201466049 is a prime.

It is not a weakly prime, because it can be changed into another prime (201466571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100733280 + 100733281.

It is an arithmetic number, because the mean of its divisors is an integer number (100733281).

Almost surely, 2^201466561 is an apocalyptic number.

It is an amenable number.

201466561 is a deficient number, since it is larger than the sum of its proper divisors (1).

201466561 is an equidigital number, since it uses as much as digits as its factorization.

201466561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 201466561 is about 14193.8916791696. The cubic root of 201466561 is about 586.2294847212.

The spelling of 201466561 in words is "two hundred one million, four hundred sixty-six thousand, five hundred sixty-one".