201513643 has 2 divisors, whose sum is σ = 201513644. Its totient is φ = 201513642.

The previous prime is 201513589. The next prime is 201513673. The reversal of 201513643 is 346315102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201513643 is a prime.

It is equal to p_11158144 and since 201513643 and 11158144 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (201513673) 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, 100756821 + 100756822.

It is an arithmetic number, because the mean of its divisors is an integer number (100756822).

Almost surely, 2^201513643 is an apocalyptic number.

201513643 is a deficient number, since it is larger than the sum of its proper divisors (1).

201513643 is an equidigital number, since it uses as much as digits as its factorization.

201513643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 201513643 is about 14195.5501126233. The cubic root of 201513643 is about 586.2751477279.

Adding to 201513643 its reverse (346315102), we get a palindrome (547828745).

The spelling of 201513643 in words is "two hundred one million, five hundred thirteen thousand, six hundred forty-three".