256341812 has 6 divisors (see below), whose sum is σ = 448598178. Its totient is φ = 128170904.

The previous prime is 256341797. The next prime is 256341829. The reversal of 256341812 is 218143652.

It can be written as a sum of positive squares in only one way, i.e., 211237156 + 45104656 = 14534^2 + 6716^2 .

It is a super-2 number, since 2×256341812² = 131422249158886688, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32042723 + ... + 32042730.

It is an arithmetic number, because the mean of its divisors is an integer number (74766363).

Almost surely, 2^256341812 is an apocalyptic number.

It is an amenable number.

256341812 is a deficient number, since it is larger than the sum of its proper divisors (192256366).

256341812 is a wasteful number, since it uses less digits than its factorization.

256341812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64085457 (or 64085455 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 256341812 is about 16010.6780618436. The cubic root of 256341812 is about 635.2428954836.

The spelling of 256341812 in words is "two hundred fifty-six million, three hundred forty-one thousand, eight hundred twelve".