256940271 has 24 divisors (see below), whose sum is σ = 432816800. Its totient is φ = 146821248.

The previous prime is 256940269. The next prime is 256940353. The reversal of 256940271 is 172049652.

It is not a de Polignac number, because 256940271 - 2¹ = 256940269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256940231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38530 + ... + 44703.

Almost surely, 2^256940271 is an apocalyptic number.

256940271 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

256940271 is a deficient number, since it is larger than the sum of its proper divisors (175876529).

256940271 is an equidigital number, since it uses as much as digits as its factorization.

256940271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83260 (or 83243 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 256940271 is about 16029.3565373037. The cubic root of 256940271 is about 635.7368601118.

The spelling of 256940271 in words is "two hundred fifty-six million, nine hundred forty thousand, two hundred seventy-one".