2005144135 has 24 divisors (see below), whose sum is σ = 2563931376. Its totient is φ = 1505095680.

The previous prime is 2005144121. The next prime is 2005144147. The reversal of 2005144135 is 5314415002.

It is a happy number.

It is not a de Polignac number, because 2005144135 - 2⁵ = 2005144103 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 23 ways as a sum of consecutive naturals, for example, 508120 + ... + 512050.

It is an arithmetic number, because the mean of its divisors is an integer number (106830474).

Almost surely, 2^2005144135 is an apocalyptic number.

2005144135 is a deficient number, since it is larger than the sum of its proper divisors (558787241).

2005144135 is a wasteful number, since it uses less digits than its factorization.

2005144135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4323 (or 4306 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2005144135 is about 44778.8357932629. The cubic root of 2005144135 is about 1261.0003257613. Note that the first 3 decimals are identical.

Adding to 2005144135 its reverse (5314415002), we get a palindrome (7319559137).

The spelling of 2005144135 in words is "two billion, five million, one hundred forty-four thousand, one hundred thirty-five".