257142856291 has 2 divisors, whose sum is σ = 257142856292. Its totient is φ = 257142856290.

The previous prime is 257142856259. The next prime is 257142856309. The reversal of 257142856291 is 192658241752.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257142856291 - 2⁵ = 257142856259 is a prime.

It is a super-2 number, since 2×257142856291² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (257142256291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128571428145 + 128571428146.

It is an arithmetic number, because the mean of its divisors is an integer number (128571428146).

Almost surely, 2^257142856291 is an apocalyptic number.

257142856291 is a deficient number, since it is larger than the sum of its proper divisors (1).

257142856291 is an equidigital number, since it uses as much as digits as its factorization.

257142856291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2419200, while the sum is 52.

The spelling of 257142856291 in words is "two hundred fifty-seven billion, one hundred forty-two million, eight hundred fifty-six thousand, two hundred ninety-one".