256043146 has 8 divisors (see below), whose sum is σ = 397308420. Its totient is φ = 123607008.

The previous prime is 256043141. The next prime is 256043191. The reversal of 256043146 is 641340652.

It can be written as a sum of positive squares in 2 ways, for example, as 247275625 + 8767521 = 15725^2 + 2961^2 .

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

It is a super-2 number, since 2×256043146² = 131116185227154632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256043141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2207211 + ... + 2207326.

Almost surely, 2^256043146 is an apocalyptic number.

256043146 is a deficient number, since it is larger than the sum of its proper divisors (141265274).

256043146 is a wasteful number, since it uses less digits than its factorization.

256043146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4414568.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 256043146 is about 16001.3482556940. The cubic root of 256043146 is about 634.9960906614.

Adding to 256043146 its reverse (641340652), we get a palindrome (897383798).

The spelling of 256043146 in words is "two hundred fifty-six million, forty-three thousand, one hundred forty-six".