215021201 has 2 divisors, whose sum is σ = 215021202. Its totient is φ = 215021200.

The previous prime is 215021197. The next prime is 215021221. The reversal of 215021201 is 102120512.

215021201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208513600 + 6507601 = 14440^2 + 2551^2 .

It is a cyclic number.

It is not a de Polignac number, because 215021201 - 2² = 215021197 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (215021221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107510600 + 107510601.

It is an arithmetic number, because the mean of its divisors is an integer number (107510601).

Almost surely, 2^215021201 is an apocalyptic number.

It is an amenable number.

215021201 is a deficient number, since it is larger than the sum of its proper divisors (1).

215021201 is an equidigital number, since it uses as much as digits as its factorization.

215021201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 215021201 is about 14663.6012288933. The cubic root of 215021201 is about 599.0923322207.

Adding to 215021201 its reverse (102120512), we get a palindrome (317141713).

The spelling of 215021201 in words is "two hundred fifteen million, twenty-one thousand, two hundred one".