257364481 has 12 divisors (see below), whose sum is σ = 296320464. Its totient is φ = 221650200.

The previous prime is 257364469. The next prime is 257364509. The reversal of 257364481 is 184463752.

It is a de Polignac number, because none of the positive numbers 2^k-257364481 is a prime.

It is a super-2 number, since 2×257364481² = 132472952160798722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257364281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28435 + ... + 36376.

It is an arithmetic number, because the mean of its divisors is an integer number (24693372).

Almost surely, 2^257364481 is an apocalyptic number.

It is an amenable number.

257364481 is a deficient number, since it is larger than the sum of its proper divisors (38955983).

257364481 is a wasteful number, since it uses less digits than its factorization.

257364481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64860 (or 64841 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 257364481 is about 16042.5833642839. The cubic root of 257364481 is about 636.0865362585.

The spelling of 257364481 in words is "two hundred fifty-seven million, three hundred sixty-four thousand, four hundred eighty-one".