215215104011 has 4 divisors (see below), whose sum is σ = 215312620992. Its totient is φ = 215117587032.

The previous prime is 215215104001. The next prime is 215215104019. The reversal of 215215104011 is 110401512512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 215215104011 - 2¹⁴ = 215215087627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215215104019) 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, 48755180 + ... + 48759593.

It is an arithmetic number, because the mean of its divisors is an integer number (53828155248).

Almost surely, 2^215215104011 is an apocalyptic number.

215215104011 is a deficient number, since it is larger than the sum of its proper divisors (97516981).

215215104011 is an equidigital number, since it uses as much as digits as its factorization.

215215104011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97516980.

The product of its (nonzero) digits is 400, while the sum is 23.

Adding to 215215104011 its reverse (110401512512), we get a palindrome (325616616523).

The spelling of 215215104011 in words is "two hundred fifteen billion, two hundred fifteen million, one hundred four thousand, eleven".