257143111 has 2 divisors, whose sum is σ = 257143112. Its totient is φ = 257143110.

The previous prime is 257143097. The next prime is 257143127. The reversal of 257143111 is 111341752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257143111 - 2¹³ = 257134919 is a prime.

It is a super-2 number, since 2×257143111² = 132245159069516642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257140111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128571555 + 128571556.

It is an arithmetic number, because the mean of its divisors is an integer number (128571556).

Almost surely, 2^257143111 is an apocalyptic number.

257143111 is a deficient number, since it is larger than the sum of its proper divisors (1).

257143111 is an equidigital number, since it uses as much as digits as its factorization.

257143111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 25.

The square root of 257143111 is about 16035.6824301306. The cubic root of 257143111 is about 635.9041090284.

Adding to 257143111 its reverse (111341752), we get a palindrome (368484863).

The spelling of 257143111 in words is "two hundred fifty-seven million, one hundred forty-three thousand, one hundred eleven".