215111140541441 has 4 divisors (see below), whose sum is σ = 215462055942612. Its totient is φ = 214760225140272.

The previous prime is 215111140541393. The next prime is 215111140541447. The reversal of 215111140541441 is 144145041111512.

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 4228349127025 + 210882791414416 = 2056295^2 + 14521804^2 .

It is a cyclic number.

It is not a de Polignac number, because 215111140541441 - 2¹⁸ = 215111140279297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215111140541447) 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, 175457699666 + ... + 175457700891.

It is an arithmetic number, because the mean of its divisors is an integer number (53865513985653).

Almost surely, 2^{215111140541441} is an apocalyptic number.

It is an amenable number.

215111140541441 is a deficient number, since it is larger than the sum of its proper divisors (350915401171).

215111140541441 is an equidigital number, since it uses as much as digits as its factorization.

215111140541441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350915401170.

The product of its (nonzero) digits is 12800, while the sum is 35.

Adding to 215111140541441 its reverse (144145041111512), we get a palindrome (359256181652953).

The spelling of 215111140541441 in words is "two hundred fifteen trillion, one hundred eleven billion, one hundred forty million, five hundred forty-one thousand, four hundred forty-one".