257130019 has 4 divisors (see below), whose sum is σ = 259489120. Its totient is φ = 254770920.

The previous prime is 257130007. The next prime is 257130023. The reversal of 257130019 is 910031752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 257130019 - 2⁷ = 257129891 is a prime.

It is a super-2 number, since 2×257130019² = 132231693341880722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257130119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1179387 + ... + 1179604.

It is an arithmetic number, because the mean of its divisors is an integer number (64872280).

Almost surely, 2^257130019 is an apocalyptic number.

257130019 is a deficient number, since it is larger than the sum of its proper divisors (2359101).

257130019 is a wasteful number, since it uses less digits than its factorization.

257130019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359100.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 257130019 is about 16035.2742103152. The cubic root of 257130019 is about 635.8933168566.

The spelling of 257130019 in words is "two hundred fifty-seven million, one hundred thirty thousand, nineteen".