215205114013 has 4 divisors (see below), whose sum is σ = 215982028060. Its totient is φ = 214428199968.

The previous prime is 215205113987. The next prime is 215205114023. The reversal of 215205114013 is 310411502512.

215205114013 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.

It can be written as a sum of positive squares in 2 ways, for example, as 100041261849 + 115163852164 = 316293^2 + 339358^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215205114013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215205114023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388456608 + ... + 388457161.

It is an arithmetic number, because the mean of its divisors is an integer number (53995507015).

Almost surely, 2^215205114013 is an apocalyptic number.

It is an amenable number.

215205114013 is a deficient number, since it is larger than the sum of its proper divisors (776914047).

215205114013 is an equidigital number, since it uses as much as digits as its factorization.

215205114013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776914046.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 215205114013 its reverse (310411502512), we get a palindrome (525616616525).

The spelling of 215205114013 in words is "two hundred fifteen billion, two hundred five million, one hundred fourteen thousand, thirteen".