2004155281 has 4 divisors (see below), whose sum is σ = 2004654064. Its totient is φ = 2003656500.

The previous prime is 2004155233. The next prime is 2004155291. The reversal of 2004155281 is 1825514002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2004155281 - 2¹¹ = 2004153233 is a prime.

It is a super-2 number, since 2×2004155281² = 8033276780720377922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2004155291) 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, 243315 + ... + 251416.

It is an arithmetic number, because the mean of its divisors is an integer number (501163516).

Almost surely, 2^2004155281 is an apocalyptic number.

It is an amenable number.

2004155281 is a deficient number, since it is larger than the sum of its proper divisors (498783).

2004155281 is an equidigital number, since it uses as much as digits as its factorization.

2004155281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498782.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 2004155281 is about 44767.7928984666. The cubic root of 2004155281 is about 1260.7930006400.

Adding to 2004155281 its reverse (1825514002), we get a palindrome (3829669283).

The spelling of 2004155281 in words is "two billion, four million, one hundred fifty-five thousand, two hundred eighty-one".