2513028281 has 4 divisors (see below), whose sum is σ = 2660853492. Its totient is φ = 2365203072.

The previous prime is 2513028269. The next prime is 2513028307. The reversal of 2513028281 is 1828203152.

It is a happy number.

2513028281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1926419881 + 586608400 = 43891^2 + 24220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2513028281 is a prime.

It is a super-2 number, since 2×2513028281² = 12630622282211629922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2513028181) 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, 73912580 + ... + 73912613.

It is an arithmetic number, because the mean of its divisors is an integer number (665213373).

Almost surely, 2^2513028281 is an apocalyptic number.

It is an amenable number.

2513028281 is a deficient number, since it is larger than the sum of its proper divisors (147825211).

2513028281 is a wasteful number, since it uses less digits than its factorization.

2513028281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147825210.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 2513028281 is about 50130.1135147328. The cubic root of 2513028281 is about 1359.5623377247.

The spelling of 2513028281 in words is "two billion, five hundred thirteen million, twenty-eight thousand, two hundred eighty-one".