215135442041 has 4 divisors (see below), whose sum is σ = 231684322212. Its totient is φ = 198586561872.

The previous prime is 215135442031. The next prime is 215135442083. The reversal of 215135442041 is 140244531512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38822791225 + 176312650816 = 197035^2 + 419896^2 .

It is a cyclic number.

It is not a de Polignac number, because 215135442041 - 2³⁰ = 214061700217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215135441989 and 215135442007.

It is not an unprimeable number, because it can be changed into a prime (215135442001) 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 3 ways as a sum of consecutive naturals, for example, 8274440066 + ... + 8274440091.

It is an arithmetic number, because the mean of its divisors is an integer number (57921080553).

Almost surely, 2^215135442041 is an apocalyptic number.

It is an amenable number.

215135442041 is a deficient number, since it is larger than the sum of its proper divisors (16548880171).

215135442041 is a wasteful number, since it uses less digits than its factorization.

215135442041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16548880170.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 215135442041 its reverse (140244531512), we get a palindrome (355379973553).

The spelling of 215135442041 in words is "two hundred fifteen billion, one hundred thirty-five million, four hundred forty-two thousand, forty-one".