257096655 has 12 divisors (see below), whose sum is σ = 445634280. Its totient is φ = 137118192.

The previous prime is 257096647. The next prime is 257096663. The reversal of 257096655 is 556690752.

It is an interprime number because it is at equal distance from previous prime (257096647) and next prime (257096663).

It is not a de Polignac number, because 257096655 - 2³ = 257096647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 5713259 = 257096655 / (2 + 5 + 7 + 0 + 9 + 6 + 6 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 257096655.

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, 2856585 + ... + 2856674.

It is an arithmetic number, because the mean of its divisors is an integer number (37136190).

Almost surely, 2^257096655 is an apocalyptic number.

257096655 is a deficient number, since it is larger than the sum of its proper divisors (188537625).

257096655 is a wasteful number, since it uses less digits than its factorization.

257096655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5713270 (or 5713267 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 45.

The square root of 257096655 is about 16034.2338451203. The cubic root of 257096655 is about 635.8658121434.

It can be divided in two parts, 2570 and 96655, that added together give a square (99225 = 315²).

The spelling of 257096655 in words is "two hundred fifty-seven million, ninety-six thousand, six hundred fifty-five".