2556613 has 8 divisors (see below), whose sum is σ = 2735640. Its totient is φ = 2380800.

The previous prime is 2556607. The next prime is 2556641. The reversal of 2556613 is 3166552.

It can be written as a sum of positive squares in 4 ways, for example, as 1014049 + 1542564 = 1007^2 + 1242^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2556613 - 2⁹ = 2556101 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556683) 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, 973 + ... + 2461.

It is an arithmetic number, because the mean of its divisors is an integer number (341955).

2^2556613 is an apocalyptic number.

It is an amenable number.

2556613 is a deficient number, since it is larger than the sum of its proper divisors (179027).

2556613 is a wasteful number, since it uses less digits than its factorization.

2556613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607.

The product of its digits is 5400, while the sum is 28.

The square root of 2556613 is about 1598.9412121776. The cubic root of 2556613 is about 136.7377190192.

The spelling of 2556613 in words is "two million, five hundred fifty-six thousand, six hundred thirteen".