215111402115 has 16 divisors (see below), whose sum is σ = 344358770688. Its totient is φ = 114665905376.

The previous prime is 215111402081. The next prime is 215111402119. The reversal of 215111402115 is 511204111512.

It is a cyclic number.

It is not a de Polignac number, because 215111402115 - 2⁷ = 215111401987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215111402119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3731427 + ... + 3788636.

It is an arithmetic number, because the mean of its divisors is an integer number (21522423168).

Almost surely, 2^215111402115 is an apocalyptic number.

215111402115 is a deficient number, since it is larger than the sum of its proper divisors (129247368573).

215111402115 is a wasteful number, since it uses less digits than its factorization.

215111402115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7521978.

The product of its (nonzero) digits is 400, while the sum is 24.

Adding to 215111402115 its reverse (511204111512), we get a palindrome (726315513627).

The spelling of 215111402115 in words is "two hundred fifteen billion, one hundred eleven million, four hundred two thousand, one hundred fifteen".