215112241 has 4 divisors (see below), whose sum is σ = 216432112. Its totient is φ = 213792372.

The previous prime is 215112229. The next prime is 215112251. The reversal of 215112241 is 142211512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215112241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215112211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659691 + ... + 660016.

It is an arithmetic number, because the mean of its divisors is an integer number (54108028).

Almost surely, 2^215112241 is an apocalyptic number.

It is an amenable number.

215112241 is a deficient number, since it is larger than the sum of its proper divisors (1319871).

215112241 is a wasteful number, since it uses less digits than its factorization.

215112241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319870.

The product of its digits is 160, while the sum is 19.

The square root of 215112241 is about 14666.7051855555. The cubic root of 215112241 is about 599.1768722101.

Adding to 215112241 its reverse (142211512), we get a palindrome (357323753).

The spelling of 215112241 in words is "two hundred fifteen million, one hundred twelve thousand, two hundred forty-one".