257198223 has 4 divisors (see below), whose sum is σ = 342930968. Its totient is φ = 171465480.

The previous prime is 257198191. The next prime is 257198237. The reversal of 257198223 is 322891752.

257198223 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 not a de Polignac number, because 257198223 - 2⁵ = 257198191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257198273) 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, 42866368 + ... + 42866373.

It is an arithmetic number, because the mean of its divisors is an integer number (85732742).

Almost surely, 2^257198223 is an apocalyptic number.

257198223 is a deficient number, since it is larger than the sum of its proper divisors (85732745).

257198223 is an equidigital number, since it uses as much as digits as its factorization.

257198223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85732744.

The product of its digits is 60480, while the sum is 39.

The square root of 257198223 is about 16037.4007557335. The cubic root of 257198223 is about 635.9495356700.

The spelling of 257198223 in words is "two hundred fifty-seven million, one hundred ninety-eight thousand, two hundred twenty-three".