201215445 has 16 divisors (see below), whose sum is σ = 322987392. Its totient is φ = 106967360.

The previous prime is 201215419. The next prime is 201215459. The reversal of 201215445 is 544512102.

It is not a de Polignac number, because 201215445 - 2⁶ = 201215381 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16902 + ... + 26231.

It is an arithmetic number, because the mean of its divisors is an integer number (20186712).

Almost surely, 2^201215445 is an apocalyptic number.

It is an amenable number.

201215445 is a deficient number, since it is larger than the sum of its proper divisors (121771947).

201215445 is a wasteful number, since it uses less digits than its factorization.

201215445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43452.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 201215445 is about 14185.0430031072. The cubic root of 201215445 is about 585.9858168085.

Adding to 201215445 its reverse (544512102), we get a palindrome (745727547).

The spelling of 201215445 in words is "two hundred one million, two hundred fifteen thousand, four hundred forty-five".