201546643 has 2 divisors, whose sum is σ = 201546644. Its totient is φ = 201546642.

The previous prime is 201546601. The next prime is 201546673. The reversal of 201546643 is 346645102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201546643 is a prime.

It is not a weakly prime, because it can be changed into another prime (201546673) 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, 100773321 + 100773322.

It is an arithmetic number, because the mean of its divisors is an integer number (100773322).

Almost surely, 2^201546643 is an apocalyptic number.

201546643 is a deficient number, since it is larger than the sum of its proper divisors (1).

201546643 is an equidigital number, since it uses as much as digits as its factorization.

201546643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 201546643 is about 14196.7124011160. The cubic root of 201546643 is about 586.3071489092.

The spelling of 201546643 in words is "two hundred one million, five hundred forty-six thousand, six hundred forty-three".