257146198 has 4 divisors (see below), whose sum is σ = 385719300. Its totient is φ = 128573098.

The previous prime is 257146193. The next prime is 257146207. The reversal of 257146198 is 891641752.

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

It is a super-2 number, since 2×257146198² = 132248334291710408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257146193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64286548 + ... + 64286551.

It is an arithmetic number, because the mean of its divisors is an integer number (96429825).

Almost surely, 2^257146198 is an apocalyptic number.

257146198 is a deficient number, since it is larger than the sum of its proper divisors (128573102).

257146198 is a wasteful number, since it uses less digits than its factorization.

257146198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128573101.

The product of its digits is 120960, while the sum is 43.

The square root of 257146198 is about 16035.7786839305. The cubic root of 257146198 is about 635.9066536920.

The spelling of 257146198 in words is "two hundred fifty-seven million, one hundred forty-six thousand, one hundred ninety-eight".