2005425251 has 4 divisors (see below), whose sum is σ = 2054338104. Its totient is φ = 1956512400.

The previous prime is 2005425229. The next prime is 2005425259. The reversal of 2005425251 is 1525245002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2005425251 - 2³⁰ = 931683427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2005425251.

It is not an unprimeable number, because it can be changed into a prime (2005425259) 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, 24456365 + ... + 24456446.

It is an arithmetic number, because the mean of its divisors is an integer number (513584526).

Almost surely, 2^2005425251 is an apocalyptic number.

2005425251 is a deficient number, since it is larger than the sum of its proper divisors (48912853).

2005425251 is an equidigital number, since it uses as much as digits as its factorization.

2005425251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48912852.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 2005425251 is about 44781.9746214925. The cubic root of 2005425251 is about 1261.0592526644.

The spelling of 2005425251 in words is "two billion, five million, four hundred twenty-five thousand, two hundred fifty-one".