215286120065 has 16 divisors (see below), whose sum is σ = 264603130176. Its totient is φ = 168063336000.

The previous prime is 215286120029. The next prime is 215286120097. The reversal of 215286120065 is 560021682512.

It is not a de Polignac number, because 215286120065 - 2¹⁸ = 215285857921 is a prime.

It is a super-2 number, since 2×215286120065² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250406 + ... + 702335.

It is an arithmetic number, because the mean of its divisors is an integer number (16537695636).

Almost surely, 2^215286120065 is an apocalyptic number.

It is an amenable number.

215286120065 is a deficient number, since it is larger than the sum of its proper divisors (49317010111).

215286120065 is a wasteful number, since it uses less digits than its factorization.

215286120065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953840.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 215286120065 in words is "two hundred fifteen billion, two hundred eighty-six million, one hundred twenty thousand, sixty-five".