257195205 has 12 divisors (see below), whose sum is σ = 445805100. Its totient is φ = 137170752.

The previous prime is 257195149. The next prime is 257195231. The reversal of 257195205 is 502591752.

It can be written as a sum of positive squares in 2 ways, for example, as 167495364 + 89699841 = 12942^2 + 9471^2 .

It is not a de Polignac number, because 257195205 - 2¹³ = 257187013 is a prime.

It is a super-2 number, since 2×257195205² = 132298746949984050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 257195205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2857680 + ... + 2857769.

It is an arithmetic number, because the mean of its divisors is an integer number (37150425).

Almost surely, 2^257195205 is an apocalyptic number.

It is an amenable number.

257195205 is a deficient number, since it is larger than the sum of its proper divisors (188609895).

257195205 is a wasteful number, since it uses less digits than its factorization.

257195205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5715460 (or 5715457 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 257195205 is about 16037.3066629032. The cubic root of 257195205 is about 635.9470482199.

The spelling of 257195205 in words is "two hundred fifty-seven million, one hundred ninety-five thousand, two hundred five".