256532371 has 2 divisors, whose sum is σ = 256532372. Its totient is φ = 256532370.

The previous prime is 256532351. The next prime is 256532377. The reversal of 256532371 is 173235652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256532371 - 2¹³ = 256524179 is a prime.

It is not a weakly prime, because it can be changed into another prime (256532377) by changing a digit.

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, 128266185 + 128266186.

It is an arithmetic number, because the mean of its divisors is an integer number (128266186).

Almost surely, 2^256532371 is an apocalyptic number.

256532371 is a deficient number, since it is larger than the sum of its proper divisors (1).

256532371 is an equidigital number, since it uses as much as digits as its factorization.

256532371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 34.

The square root of 256532371 is about 16016.6279534739. The cubic root of 256532371 is about 635.4002651387.

The spelling of 256532371 in words is "two hundred fifty-six million, five hundred thirty-two thousand, three hundred seventy-one".