257030071 has 2 divisors, whose sum is σ = 257030072. Its totient is φ = 257030070.

The previous prime is 257030063. The next prime is 257030087. The reversal of 257030071 is 170030752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257030071 - 2³ = 257030063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257030471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128515035 + 128515036.

It is an arithmetic number, because the mean of its divisors is an integer number (128515036).

Almost surely, 2^257030071 is an apocalyptic number.

257030071 is a deficient number, since it is larger than the sum of its proper divisors (1).

257030071 is an equidigital number, since it uses as much as digits as its factorization.

257030071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 257030071 is about 16032.1574031694. The cubic root of 257030071 is about 635.8109143142.

The spelling of 257030071 in words is "two hundred fifty-seven million, thirty thousand, seventy-one".