215565028331151 has 16 divisors (see below), whose sum is σ = 299966706616320. Its totient is φ = 137438773860960.

The previous prime is 215565028331143. The next prime is 215565028331173. The reversal of 215565028331151 is 151133820565512.

It is a happy number.

It is not a de Polignac number, because 215565028331151 - 2³ = 215565028331143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215565028331151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215565028331131) 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, 260758591 + ... + 261583968.

It is an arithmetic number, because the mean of its divisors is an integer number (18747919163520).

Almost surely, 2^{215565028331151} is an apocalyptic number.

215565028331151 is a deficient number, since it is larger than the sum of its proper divisors (84401678285169).

215565028331151 is a wasteful number, since it uses less digits than its factorization.

215565028331151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522348566.

The product of its (nonzero) digits is 1080000, while the sum is 48.

Adding to 215565028331151 its reverse (151133820565512), we get a palindrome (366698848896663).

The spelling of 215565028331151 in words is "two hundred fifteen trillion, five hundred sixty-five billion, twenty-eight million, three hundred thirty-one thousand, one hundred fifty-one".