201215257 has 2 divisors, whose sum is σ = 201215258. Its totient is φ = 201215256.

The previous prime is 201215243. The next prime is 201215299. The reversal of 201215257 is 752512102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196532361 + 4682896 = 14019^2 + 2164^2 .

It is a cyclic number.

It is not a de Polignac number, because 201215257 - 2¹¹ = 201213209 is a prime.

It is not a weakly prime, because it can be changed into another prime (201215057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100607628 + 100607629.

It is an arithmetic number, because the mean of its divisors is an integer number (100607629).

Almost surely, 2^201215257 is an apocalyptic number.

It is an amenable number.

201215257 is a deficient number, since it is larger than the sum of its proper divisors (1).

201215257 is an equidigital number, since it uses as much as digits as its factorization.

201215257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 201215257 is about 14185.0363764074. The cubic root of 201215257 is about 585.9856343087.

Adding to 201215257 its reverse (752512102), we get a palindrome (953727359).

The spelling of 201215257 in words is "two hundred one million, two hundred fifteen thousand, two hundred fifty-seven".