2003161855 has 16 divisors (see below), whose sum is σ = 2464349184. Its totient is φ = 1562421280.

The previous prime is 2003161847. The next prime is 2003161879. The reversal of 2003161855 is 5581613002.

It is not a de Polignac number, because 2003161855 - 2³ = 2003161847 is a prime.

It is a Duffinian number.

It is a congruent 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, 45600 + ... + 78010.

It is an arithmetic number, because the mean of its divisors is an integer number (154021824).

Almost surely, 2^2003161855 is an apocalyptic number.

2003161855 is a deficient number, since it is larger than the sum of its proper divisors (461187329).

2003161855 is a wasteful number, since it uses less digits than its factorization.

2003161855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32726.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 2003161855 is about 44756.6962029147. The cubic root of 2003161855 is about 1260.5846482625.

Adding to 2003161855 its reverse (5581613002), we get a palindrome (7584774857).

The spelling of 2003161855 in words is "two billion, three million, one hundred sixty-one thousand, eight hundred fifty-five".