215231155015 has 16 divisors (see below), whose sum is σ = 269590003200. Its totient is φ = 164647799712.

The previous prime is 215231155003. The next prime is 215231155021. The reversal of 215231155015 is 510551132512.

215231155015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 215231155015 - 2⁹ = 215231154503 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 87646 + ... + 661924.

It is an arithmetic number, because the mean of its divisors is an integer number (16849375200).

Almost surely, 2^215231155015 is an apocalyptic number.

215231155015 is a deficient number, since it is larger than the sum of its proper divisors (54358848185).

215231155015 is a wasteful number, since it uses less digits than its factorization.

215231155015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577566.

The product of its (nonzero) digits is 7500, while the sum is 31.

Adding to 215231155015 its reverse (510551132512), we get a palindrome (725782287527).

The spelling of 215231155015 in words is "two hundred fifteen billion, two hundred thirty-one million, one hundred fifty-five thousand, fifteen".