257127216 has 20 divisors (see below), whose sum is σ = 664245432. Its totient is φ = 85709056.

The previous prime is 257127203. The next prime is 257127223. The reversal of 257127216 is 612721752.

It is a super-2 number, since 2×257127216² = 132228810415821312, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2678361 + ... + 2678456.

Almost surely, 2^257127216 is an apocalyptic number.

It is an amenable number.

257127216 is an abundant number, since it is smaller than the sum of its proper divisors (407118216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257127216 is a wasteful number, since it uses less digits than its factorization.

257127216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356828 (or 5356822 counting only the distinct ones).

The product of its digits is 11760, while the sum is 33.

The square root of 257127216 is about 16035.1868090147. The cubic root of 257127216 is about 635.8910062027.

Adding to 257127216 its reverse (612721752), we get a palindrome (869848968).

The spelling of 257127216 in words is "two hundred fifty-seven million, one hundred twenty-seven thousand, two hundred sixteen".