201521207 has 2 divisors, whose sum is σ = 201521208. Its totient is φ = 201521206.

The previous prime is 201521161. The next prime is 201521219. The reversal of 201521207 is 702125102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201521207 - 2⁸ = 201520951 is a prime.

It is a super-2 number, since 2×201521207² = 81221593741473698, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201521267) 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, 100760603 + 100760604.

It is an arithmetic number, because the mean of its divisors is an integer number (100760604).

Almost surely, 2^201521207 is an apocalyptic number.

201521207 is a deficient number, since it is larger than the sum of its proper divisors (1).

201521207 is an equidigital number, since it uses as much as digits as its factorization.

201521207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 201521207 is about 14195.8165316406. The cubic root of 201521207 is about 586.2824830952.

Adding to 201521207 its reverse (702125102), we get a palindrome (903646309).

The spelling of 201521207 in words is "two hundred one million, five hundred twenty-one thousand, two hundred seven".