257013215 has 8 divisors (see below), whose sum is σ = 315938448. Its totient is φ = 200595520.

The previous prime is 257013187. The next prime is 257013277. The reversal of 257013215 is 512310752.

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

It is not a de Polignac number, because 257013215 - 2⁶ = 257013151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 626657 + ... + 627066.

It is an arithmetic number, because the mean of its divisors is an integer number (39492306).

Almost surely, 2^257013215 is an apocalyptic number.

257013215 is a deficient number, since it is larger than the sum of its proper divisors (58925233).

257013215 is a wasteful number, since it uses less digits than its factorization.

257013215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253769.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 257013215 is about 16031.6317011089. The cubic root of 257013215 is about 635.7970152102.

Adding to 257013215 its reverse (512310752), we get a palindrome (769323967).

The spelling of 257013215 in words is "two hundred fifty-seven million, thirteen thousand, two hundred fifteen".