2513281 has 2 divisors, whose sum is σ = 2513282. Its totient is φ = 2513280.

The previous prime is 2513249. The next prime is 2513293. The reversal of 2513281 is 1823152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2509056 + 4225 = 1584^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 2513281 - 2⁵ = 2513249 is a prime.

It is a super-2 number, since 2×2513281² = 12633162769922, which contains 22 as substring.

2513281 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2513881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1256640 + 1256641.

It is an arithmetic number, because the mean of its divisors is an integer number (1256641).

2^2513281 is an apocalyptic number.

It is an amenable number.

2513281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2513281 is an equidigital number, since it uses as much as digits as its factorization.

2513281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 22.

The square root of 2513281 is about 1585.3330880291. Note that the first 3 decimals coincide. The cubic root of 2513281 is about 135.9607910327.

The spelling of 2513281 in words is "two million, five hundred thirteen thousand, two hundred eighty-one".