257214863 has 8 divisors (see below), whose sum is σ = 264528000. Its totient is φ = 249962328.

The previous prime is 257214847. The next prime is 257214869. The reversal of 257214863 is 368412752.

It is a happy number.

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 257214863 - 2⁴ = 257214847 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 (257214869) 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, 6473 + ... + 23586.

It is an arithmetic number, because the mean of its divisors is an integer number (33066000).

Almost surely, 2^257214863 is an apocalyptic number.

257214863 is a deficient number, since it is larger than the sum of its proper divisors (7313137).

257214863 is a wasteful number, since it uses less digits than its factorization.

257214863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30301.

The product of its digits is 80640, while the sum is 38.

The square root of 257214863 is about 16037.9195346529. The cubic root of 257214863 is about 635.9632500883.

The spelling of 257214863 in words is "two hundred fifty-seven million, two hundred fourteen thousand, eight hundred sixty-three".