2215855234585 has 16 divisors (see below), whose sum is σ = 2858527699200. Its totient is φ = 1643653420416.

The previous prime is 2215855234583. The next prime is 2215855234609. The reversal of 2215855234585 is 5854325585122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2215855234585 - 2¹ = 2215855234583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2215855234583) 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, 248131620 + ... + 248140549.

It is an arithmetic number, because the mean of its divisors is an integer number (178657981200).

Almost surely, 2^{2215855234585} is an apocalyptic number.

It is an amenable number.

2215855234585 is a deficient number, since it is larger than the sum of its proper divisors (642672464615).

2215855234585 is a wasteful number, since it uses less digits than its factorization.

2215855234585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496272240.

The product of its digits is 19200000, while the sum is 55.

The spelling of 2215855234585 in words is "two trillion, two hundred fifteen billion, eight hundred fifty-five million, two hundred thirty-four thousand, five hundred eighty-five".