257230197 has 24 divisors (see below), whose sum is σ = 429758784. Its totient is φ = 145214784.

The previous prime is 257230123. The next prime is 257230199. The reversal of 257230197 is 791032752.

It is not a de Polignac number, because 257230197 - 2⁷ = 257230069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257230199) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19368 + ... + 29825.

It is an arithmetic number, because the mean of its divisors is an integer number (17906616).

Almost surely, 2^257230197 is an apocalyptic number.

It is an amenable number.

257230197 is a deficient number, since it is larger than the sum of its proper divisors (172528587).

257230197 is a wasteful number, since it uses less digits than its factorization.

257230197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49289 (or 49286 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 257230197 is about 16038.3975820529. The cubic root of 257230197 is about 635.9758875990.

The spelling of 257230197 in words is "two hundred fifty-seven million, two hundred thirty thousand, one hundred ninety-seven".