2185154042 has 8 divisors (see below), whose sum is σ = 3279048096. Its totient is φ = 1092138012.

The previous prime is 2185154021. The next prime is 2185154047. The reversal of 2185154042 is 2404515812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2185154047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213248 + ... + 223259.

It is an arithmetic number, because the mean of its divisors is an integer number (409881012).

Almost surely, 2^2185154042 is an apocalyptic number.

2185154042 is a deficient number, since it is larger than the sum of its proper divisors (1093894054).

2185154042 is a wasteful number, since it uses less digits than its factorization.

2185154042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439012.

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 2185154042 is about 46745.6312611136. The cubic root of 2185154042 is about 1297.6593071670.

Adding to 2185154042 its reverse (2404515812), we get a palindrome (4589669854).

The spelling of 2185154042 in words is "two billion, one hundred eighty-five million, one hundred fifty-four thousand, forty-two".