215801201 has 12 divisors (see below), whose sum is σ = 271090176. Its totient is φ = 168156120.

The previous prime is 215801189. The next prime is 215801233. The reversal of 215801201 is 102108512.

It is a happy number.

It is not a de Polignac number, because 215801201 - 2²² = 211606897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215801401) 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 in 11 ways as a sum of consecutive naturals, for example, 126545 + ... + 128238.

It is an arithmetic number, because the mean of its divisors is an integer number (22590848).

Almost surely, 2^215801201 is an apocalyptic number.

It is an amenable number.

215801201 is a deficient number, since it is larger than the sum of its proper divisors (55288975).

215801201 is a wasteful number, since it uses less digits than its factorization.

215801201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254812 (or 254801 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 215801201 is about 14690.1736204852. The cubic root of 215801201 is about 599.8158703514.

Adding to 215801201 its reverse (102108512), we get a palindrome (317909713).

The spelling of 215801201 in words is "two hundred fifteen million, eight hundred one thousand, two hundred one".