215860201 has 2 divisors, whose sum is σ = 215860202. Its totient is φ = 215860200.

The previous prime is 215860187. The next prime is 215860207. The reversal of 215860201 is 102068512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191850201 + 24010000 = 13851^2 + 4900^2 .

It is a cyclic number.

It is not a de Polignac number, because 215860201 - 2⁹ = 215859689 is a prime.

It is not a weakly prime, because it can be changed into another prime (215860207) 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, 107930100 + 107930101.

It is an arithmetic number, because the mean of its divisors is an integer number (107930101).

Almost surely, 2^215860201 is an apocalyptic number.

It is an amenable number.

215860201 is a deficient number, since it is larger than the sum of its proper divisors (1).

215860201 is an equidigital number, since it uses as much as digits as its factorization.

215860201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 215860201 is about 14692.1816283355. The cubic root of 215860201 is about 599.8705285454.

The spelling of 215860201 in words is "two hundred fifteen million, eight hundred sixty thousand, two hundred one".