215442113 has 4 divisors (see below), whose sum is σ = 217533888. Its totient is φ = 213350340.

The previous prime is 215442067. The next prime is 215442133. The reversal of 215442113 is 311244512.

215442113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 215442113 - 2¹⁸ = 215179969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215442133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1045733 + ... + 1045938.

It is an arithmetic number, because the mean of its divisors is an integer number (54383472).

Almost surely, 2^215442113 is an apocalyptic number.

It is an amenable number.

215442113 is a deficient number, since it is larger than the sum of its proper divisors (2091775).

215442113 is a wasteful number, since it uses less digits than its factorization.

215442113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091774.

The product of its digits is 960, while the sum is 23.

The square root of 215442113 is about 14677.9464844371. The cubic root of 215442113 is about 599.4829925965.

Adding to 215442113 its reverse (311244512), we get a palindrome (526686625).

The spelling of 215442113 in words is "two hundred fifteen million, four hundred forty-two thousand, one hundred thirteen".