201015601 has 2 divisors, whose sum is σ = 201015602. Its totient is φ = 201015600.

The previous prime is 201015593. The next prime is 201015629. The reversal of 201015601 is 106510102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165791376 + 35224225 = 12876^2 + 5935^2 .

It is a cyclic number.

It is not a de Polignac number, because 201015601 - 2³ = 201015593 is a prime.

It is not a weakly prime, because it can be changed into another prime (201015631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100507800 + 100507801.

It is an arithmetic number, because the mean of its divisors is an integer number (100507801).

Almost surely, 2^201015601 is an apocalyptic number.

It is an amenable number.

201015601 is a deficient number, since it is larger than the sum of its proper divisors (1).

201015601 is an equidigital number, since it uses as much as digits as its factorization.

201015601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 201015601 is about 14177.9970729296. The cubic root of 201015601 is about 585.7917552639.

Adding to 201015601 its reverse (106510102), we get a palindrome (307525703).

The spelling of 201015601 in words is "two hundred one million, fifteen thousand, six hundred one".