256521196 has 6 divisors (see below), whose sum is σ = 448912100. Its totient is φ = 128260596.

The previous prime is 256521193. The next prime is 256521227. The reversal of 256521196 is 691125652.

It is not an unprimeable number, because it can be changed into a prime (256521193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32065146 + ... + 32065153.

Almost surely, 2^256521196 is an apocalyptic number.

It is an amenable number.

256521196 is a deficient number, since it is larger than the sum of its proper divisors (192390904).

256521196 is a wasteful number, since it uses less digits than its factorization.

256521196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64130303 (or 64130301 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The square root of 256521196 is about 16016.2790934724. The cubic root of 256521196 is about 635.3910386214.

The spelling of 256521196 in words is "two hundred fifty-six million, five hundred twenty-one thousand, one hundred ninety-six".