215165505151 has 16 divisors (see below), whose sum is σ = 226239156000. Its totient is φ = 204373749888.

The previous prime is 215165505119. The next prime is 215165505173. The reversal of 215165505151 is 151505561512.

It is a cyclic number.

It is not a de Polignac number, because 215165505151 - 2⁵ = 215165505119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215165505151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215165505101) 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, 3066165 + ... + 3135553.

It is an arithmetic number, because the mean of its divisors is an integer number (14139947250).

Almost surely, 2^215165505151 is an apocalyptic number.

215165505151 is a deficient number, since it is larger than the sum of its proper divisors (11073650849).

215165505151 is a wasteful number, since it uses less digits than its factorization.

215165505151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71418.

The product of its (nonzero) digits is 37500, while the sum is 37.

The spelling of 215165505151 in words is "two hundred fifteen billion, one hundred sixty-five million, five hundred five thousand, one hundred fifty-one".