215135303105 has 4 divisors (see below), whose sum is σ = 258162363732. Its totient is φ = 172108242480.

The previous prime is 215135303101. The next prime is 215135303107. The reversal of 215135303105 is 501303531512.

It is a happy number.

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 152068021681 + 63067281424 = 389959^2 + 251132^2 .

It is not a de Polignac number, because 215135303105 - 2² = 215135303101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215135303101) 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, 21513530306 + ... + 21513530315.

It is an arithmetic number, because the mean of its divisors is an integer number (64540590933).

Almost surely, 2^215135303105 is an apocalyptic number.

It is an amenable number.

215135303105 is a deficient number, since it is larger than the sum of its proper divisors (43027060627).

215135303105 is an equidigital number, since it uses as much as digits as its factorization.

215135303105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43027060626.

The product of its (nonzero) digits is 6750, while the sum is 29.

Adding to 215135303105 its reverse (501303531512), we get a palindrome (716438834617).

The spelling of 215135303105 in words is "two hundred fifteen billion, one hundred thirty-five million, three hundred three thousand, one hundred five".