257016530 has 8 divisors (see below), whose sum is σ = 462629772. Its totient is φ = 102806608.

The previous prime is 257016511. The next prime is 257016563. The reversal of 257016530 is 35610752.

257016530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 244703449 + 12313081 = 15643^2 + 3509^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 257016493 and 257016502.

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, 12850817 + ... + 12850836.

Almost surely, 2^257016530 is an apocalyptic number.

257016530 is a deficient number, since it is larger than the sum of its proper divisors (205613242).

257016530 is a wasteful number, since it uses less digits than its factorization.

257016530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25701660.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 257016530 is about 16031.7350901267. The cubic root of 257016530 is about 635.7997487376.

The spelling of 257016530 in words is "two hundred fifty-seven million, sixteen thousand, five hundred thirty".