257144027 has 4 divisors (see below), whose sum is σ = 293878896. Its totient is φ = 220409160.

The previous prime is 257144021. The next prime is 257144047. The reversal of 257144027 is 720441752.

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 257144027 - 2⁶ = 257143963 is a prime.

It is a super-2 number, since 2×257144027² = 132246101243553458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257143984 and 257144002.

It is not an unprimeable number, because it can be changed into a prime (257144021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18367424 + ... + 18367437.

It is an arithmetic number, because the mean of its divisors is an integer number (73469724).

Almost surely, 2^257144027 is an apocalyptic number.

257144027 is a deficient number, since it is larger than the sum of its proper divisors (36734869).

257144027 is an equidigital number, since it uses as much as digits as its factorization.

257144027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36734868.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 257144027 is about 16035.7109914091. The cubic root of 257144027 is about 635.9048641040.

Adding to 257144027 its reverse (720441752), we get a palindrome (977585779).

The spelling of 257144027 in words is "two hundred fifty-seven million, one hundred forty-four thousand, twenty-seven".