2005415121 has 4 divisors (see below), whose sum is σ = 2673886832. Its totient is φ = 1336943412.

The previous prime is 2005415099. The next prime is 2005415131. The reversal of 2005415121 is 1215145002.

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 not a de Polignac number, because 2005415121 - 2¹¹ = 2005413073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005415131) 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, 334235851 + ... + 334235856.

It is an arithmetic number, because the mean of its divisors is an integer number (668471708).

Almost surely, 2^2005415121 is an apocalyptic number.

It is an amenable number.

2005415121 is a deficient number, since it is larger than the sum of its proper divisors (668471711).

2005415121 is an equidigital number, since it uses as much as digits as its factorization.

2005415121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668471710.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 2005415121 is about 44781.8615178065. The cubic root of 2005415121 is about 1261.0571293323.

The spelling of 2005415121 in words is "two billion, five million, four hundred fifteen thousand, one hundred twenty-one".