2185138548 has 36 divisors (see below), whose sum is σ = 5814259360. Its totient is φ = 690043536.

The previous prime is 2185138531. The next prime is 2185138597. The reversal of 2185138548 is 8458315812.

2185138548 is a `hidden beast` number, since 2 + 18 + 513 + 85 + 48 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1596640 + ... + 1598007.

Almost surely, 2^2185138548 is an apocalyptic number.

It is an amenable number.

2185138548 is an abundant number, since it is smaller than the sum of its proper divisors (3629120812).

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

2185138548 is a wasteful number, since it uses less digits than its factorization.

2185138548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194676 (or 3194671 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 2185138548 is about 46745.4655341029. The cubic root of 2185138548 is about 1297.6562401093.

The spelling of 2185138548 in words is "two billion, one hundred eighty-five million, one hundred thirty-eight thousand, five hundred forty-eight".