2005151513 has 4 divisors (see below), whose sum is σ = 2123101620. Its totient is φ = 1887201408.

The previous prime is 2005151501. The next prime is 2005151527. The reversal of 2005151513 is 3151515002.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1533740569 + 471410944 = 39163^2 + 21712^2 .

It is a cyclic number.

It is not a de Polignac number, because 2005151513 - 2²⁸ = 1736716057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2005151543) 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, 58975028 + ... + 58975061.

It is an arithmetic number, because the mean of its divisors is an integer number (530775405).

Almost surely, 2^2005151513 is an apocalyptic number.

It is an amenable number.

2005151513 is a deficient number, since it is larger than the sum of its proper divisors (117950107).

2005151513 is a wasteful number, since it uses less digits than its factorization.

2005151513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117950106.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 2005151513 is about 44778.9181758559. The cubic root of 2005151513 is about 1261.0018723914.

Adding to 2005151513 its reverse (3151515002), we get a palindrome (5156666515).

The spelling of 2005151513 in words is "two billion, five million, one hundred fifty-one thousand, five hundred thirteen".