215122201 has 12 divisors (see below), whose sum is σ = 254489040. Its totient is φ = 181262760.

The previous prime is 215122183. The next prime is 215122207. The reversal of 215122201 is 102221512.

It is a happy number.

It is not a de Polignac number, because 215122201 - 2⁵ = 215122169 is a prime.

It is a super-2 number, since 2×215122201² = 92555122726168802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215122207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34315 + ... + 40096.

It is an arithmetic number, because the mean of its divisors is an integer number (21207420).

Almost surely, 2^215122201 is an apocalyptic number.

It is an amenable number.

215122201 is a deficient number, since it is larger than the sum of its proper divisors (39366839).

215122201 is an equidigital number, since it uses as much as digits as its factorization.

215122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74484 (or 74477 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 215122201 is about 14667.0447261880. The cubic root of 215122201 is about 599.1861196453.

Adding to 215122201 its reverse (102221512), we get a palindrome (317343713).

The spelling of 215122201 in words is "two hundred fifteen million, one hundred twenty-two thousand, two hundred one".