256530146 has 16 divisors (see below), whose sum is σ = 400930560. Its totient is φ = 122964240.

The previous prime is 256530137. The next prime is 256530163. The reversal of 256530146 is 641035652.

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, 12701 + ... + 25968.

It is an arithmetic number, because the mean of its divisors is an integer number (25058160).

Almost surely, 2^256530146 is an apocalyptic number.

256530146 is a deficient number, since it is larger than the sum of its proper divisors (144400414).

256530146 is a wasteful number, since it uses less digits than its factorization.

256530146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38809.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 256530146 is about 16016.5584942584. The cubic root of 256530146 is about 635.3984281130.

Adding to 256530146 its reverse (641035652), we get a palindrome (897565798).

The spelling of 256530146 in words is "two hundred fifty-six million, five hundred thirty thousand, one hundred forty-six".