257493071 has 4 divisors (see below), whose sum is σ = 280901544. Its totient is φ = 234084600.

The previous prime is 257493023. The next prime is 257493083. The reversal of 257493071 is 170394752.

257493071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257493071 is a prime.

It is a super-2 number, since 2×257493071² = 132605363226022082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257493011) 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, 11704220 + ... + 11704241.

It is an arithmetic number, because the mean of its divisors is an integer number (70225386).

Almost surely, 2^257493071 is an apocalyptic number.

257493071 is a deficient number, since it is larger than the sum of its proper divisors (23408473).

257493071 is a wasteful number, since it uses less digits than its factorization.

257493071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23408472.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 257493071 is about 16046.5906347735. The cubic root of 257493071 is about 636.1924570503.

The spelling of 257493071 in words is "two hundred fifty-seven million, four hundred ninety-three thousand, seventy-one".