256210506 has 16 divisors (see below), whose sum is σ = 569356800. Its totient is φ = 85403484.

The previous prime is 256210463. The next prime is 256210511. The reversal of 256210506 is 605012652.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 256210506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2372266 + ... + 2372373.

It is an arithmetic number, because the mean of its divisors is an integer number (35584800).

Almost surely, 2^256210506 is an apocalyptic number.

256210506 is an abundant number, since it is smaller than the sum of its proper divisors (313146294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256210506 is a wasteful number, since it uses less digits than its factorization.

256210506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4744650 (or 4744644 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 256210506 is about 16006.5769607371. The cubic root of 256210506 is about 635.1344134416.

The spelling of 256210506 in words is "two hundred fifty-six million, two hundred ten thousand, five hundred six".