257563317 has 8 divisors (see below), whose sum is σ = 374637600. Its totient is φ = 156098960.

The previous prime is 257563307. The next prime is 257563321. The reversal of 257563317 is 713365752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257563317 - 2¹⁶ = 257497781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257563307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3902442 + ... + 3902507.

It is an arithmetic number, because the mean of its divisors is an integer number (46829700).

Almost surely, 2^257563317 is an apocalyptic number.

It is an amenable number.

257563317 is a deficient number, since it is larger than the sum of its proper divisors (117074283).

257563317 is a wasteful number, since it uses less digits than its factorization.

257563317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7804963.

The product of its digits is 132300, while the sum is 39.

The square root of 257563317 is about 16048.7792993735. The cubic root of 257563317 is about 636.2503044478.

The spelling of 257563317 in words is "two hundred fifty-seven million, five hundred sixty-three thousand, three hundred seventeen".