515656 has 16 divisors (see below), whose sum is σ = 990000. Its totient is φ = 251664.

The previous prime is 515653. The next prime is 515663. The reversal of 515656 is 656515.

515656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×515656² = 531802220672, which contains 22 as substring.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (515651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406 + ... + 1093.

It is an arithmetic number, because the mean of its divisors is an integer number (61875).

2⁵¹⁵⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

515656 is a deficient number, since it is larger than the sum of its proper divisors (474344).

515656 is a wasteful number, since it uses less digits than its factorization.

515656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548 (or 1544 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 515656 is about 718.0919161222. The cubic root of 515656 is about 80.1899652248.

The spelling of 515656 in words is "five hundred fifteen thousand, six hundred fifty-six".