257882481 has 32 divisors (see below), whose sum is σ = 393789440. Its totient is φ = 166698000.

The previous prime is 257882477. The next prime is 257882483. The reversal of 257882481 is 184288752.

It is a happy number.

257882481 is a `hidden beast` number, since 25 + 78 + 82 + 481 = 666.

It is not a de Polignac number, because 257882481 - 2² = 257882477 is a prime.

It is a super-2 number, since 2×257882481² = 133006748013430722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257882483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174576 + ... + 176046.

It is an arithmetic number, because the mean of its divisors is an integer number (12305920).

Almost surely, 2^257882481 is an apocalyptic number.

It is an amenable number.

257882481 is a deficient number, since it is larger than the sum of its proper divisors (135906959).

257882481 is a wasteful number, since it uses less digits than its factorization.

257882481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674 (or 1668 counting only the distinct ones).

The product of its digits is 286720, while the sum is 45.

The square root of 257882481 is about 16058.7197808543. The cubic root of 257882481 is about 636.5130027928.

The spelling of 257882481 in words is "two hundred fifty-seven million, eight hundred eighty-two thousand, four hundred eighty-one".