2001438513 has 6 divisors (see below), whose sum is σ = 2890966754. Its totient is φ = 1334292336.

The previous prime is 2001438503. The next prime is 2001438563. The reversal of 2001438513 is 3158341002.

It is a happy number.

2001438513 is a `hidden beast` number, since 2 + 0 + 0 + 143 + 8 + 513 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1262523024 + 738915489 = 35532^2 + 27183^2 .

It is not a de Polignac number, because 2001438513 - 2¹⁶ = 2001372977 is a prime.

It is a super-2 number, since 2×2001438513² = 8011512242639302338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001438503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111191020 + ... + 111191037.

Almost surely, 2^2001438513 is an apocalyptic number.

It is an amenable number.

2001438513 is a deficient number, since it is larger than the sum of its proper divisors (889528241).

2001438513 is a wasteful number, since it uses less digits than its factorization.

2001438513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222382063 (or 222382060 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 2001438513 is about 44737.4397233458. The cubic root of 2001438513 is about 1260.2230463037.

Adding to 2001438513 its reverse (3158341002), we get a palindrome (5159779515).

The spelling of 2001438513 in words is "two billion, one million, four hundred thirty-eight thousand, five hundred thirteen".