2256513 has 8 divisors (see below), whose sum is σ = 3438528. Its totient is φ = 1289424.

The previous prime is 2256479. The next prime is 2256533. The reversal of 2256513 is 3156522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2256513 - 2¹⁰ = 2255489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2256533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53706 + ... + 53747.

It is an arithmetic number, because the mean of its divisors is an integer number (429816).

2^2256513 is an apocalyptic number.

It is an amenable number.

2256513 is a deficient number, since it is larger than the sum of its proper divisors (1182015).

2256513 is a wasteful number, since it uses less digits than its factorization.

2256513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107463.

The product of its digits is 1800, while the sum is 24.

The square root of 2256513 is about 1502.1694311894. The cubic root of 2256513 is about 131.1633841220.

Subtracting 2256513 from its reverse (3156522), we obtain a palindrome (900009).

It can be divided in two parts, 22565 and 13, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 2256513 in words is "two million, two hundred fifty-six thousand, five hundred thirteen".