2651001013 has 4 divisors (see below), whose sum is σ = 2694460108. Its totient is φ = 2607541920.

The previous prime is 2651000977. The next prime is 2651001047. The reversal of 2651001013 is 3101001562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3101001562 = 2 ⋅1550500781.

It can be written as a sum of positive squares in 2 ways, for example, as 679019364 + 1971981649 = 26058^2 + 44407^2 .

It is a cyclic number.

It is not a de Polignac number, because 2651001013 - 2⁹ = 2651000501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2651001313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21729456 + ... + 21729577.

It is an arithmetic number, because the mean of its divisors is an integer number (673615027).

Almost surely, 2^2651001013 is an apocalyptic number.

It is an amenable number.

2651001013 is a deficient number, since it is larger than the sum of its proper divisors (43459095).

2651001013 is an equidigital number, since it uses as much as digits as its factorization.

2651001013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43459094.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 2651001013 is about 51487.8724846929. The cubic root of 2651001013 is about 1384.0017243914.

Adding to 2651001013 its reverse (3101001562), we get a palindrome (5752002575).

The spelling of 2651001013 in words is "two billion, six hundred fifty-one million, one thousand, thirteen".