2185215534 has 48 divisors (see below), whose sum is σ = 4818747024. Its totient is φ = 715564800.

The previous prime is 2185215457. The next prime is 2185215559. The reversal of 2185215534 is 4355125812.

2185215534 is a `hidden beast` number, since 2 + 1 + 85 + 21 + 553 + 4 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 266374 + ... + 274454.

It is an arithmetic number, because the mean of its divisors is an integer number (100390563).

Almost surely, 2^2185215534 is an apocalyptic number.

2185215534 is an abundant number, since it is smaller than the sum of its proper divisors (2633531490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2185215534 is a wasteful number, since it uses less digits than its factorization.

2185215534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8353 (or 8350 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 2185215534 is about 46746.2889863998. The cubic root of 2185215534 is about 1297.6714794466.

The spelling of 2185215534 in words is "two billion, one hundred eighty-five million, two hundred fifteen thousand, five hundred thirty-four".