257130015 has 16 divisors (see below), whose sum is σ = 435608928. Its totient is φ = 129069056.

The previous prime is 257130007. The next prime is 257130023. The reversal of 257130015 is 510031752.

It is an interprime number because it is at equal distance from previous prime (257130007) and next prime (257130023).

It is a cyclic number.

It is not a de Polignac number, because 257130015 - 2³ = 257130007 is a prime.

It is a super-2 number, since 2×257130015² = 132231689227800450, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 503922 + ... + 504431.

It is an arithmetic number, because the mean of its divisors is an integer number (27225558).

Almost surely, 2^257130015 is an apocalyptic number.

257130015 is a deficient number, since it is larger than the sum of its proper divisors (178478913).

257130015 is a wasteful number, since it uses less digits than its factorization.

257130015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008378.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 257130015 is about 16035.2740855902. The cubic root of 257130015 is about 635.8933135592.

Adding to 257130015 its reverse (510031752), we get a palindrome (767161767).

The spelling of 257130015 in words is "two hundred fifty-seven million, one hundred thirty thousand, fifteen".