257157199 has 4 divisors (see below), whose sum is σ = 276938536. Its totient is φ = 237375864.

The previous prime is 257157179. The next prime is 257157209. The reversal of 257157199 is 991751752.

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

It is a cyclic number.

It is not a de Polignac number, because 257157199 - 2⁵ = 257157167 is a prime.

It is a super-2 number, since 2×257157199² = 132259649995051202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257157119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9890649 + ... + 9890674.

It is an arithmetic number, because the mean of its divisors is an integer number (69234634).

Almost surely, 2^257157199 is an apocalyptic number.

257157199 is a deficient number, since it is larger than the sum of its proper divisors (19781337).

257157199 is a wasteful number, since it uses less digits than its factorization.

257157199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19781336.

The product of its digits is 198450, while the sum is 46.

The square root of 257157199 is about 16036.1216944746. The cubic root of 257157199 is about 635.9157218270.

The spelling of 257157199 in words is "two hundred fifty-seven million, one hundred fifty-seven thousand, one hundred ninety-nine".