2513000021 has 16 divisors (see below), whose sum is σ = 3068290560. Its totient is φ = 2010167280.

The previous prime is 2513000011. The next prime is 2513000041. The reversal of 2513000021 is 1200003152.

It is a happy number.

2513000021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2513000021 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 (2513000011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132095 + ... + 149916.

It is an arithmetic number, because the mean of its divisors is an integer number (191768160).

Almost surely, 2^2513000021 is an apocalyptic number.

It is an amenable number.

2513000021 is a deficient number, since it is larger than the sum of its proper divisors (555290539).

2513000021 is a wasteful number, since it uses less digits than its factorization.

2513000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282104.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 2513000021 is about 50129.8316474332. The cubic root of 2513000021 is about 1359.5572414330.

Adding to 2513000021 its reverse (1200003152), we get a palindrome (3713003173).

The spelling of 2513000021 in words is "two billion, five hundred thirteen million, twenty-one", and thus it is an aban number.