257455263 has 16 divisors (see below), whose sum is σ = 389137280. Its totient is φ = 150094944.

The previous prime is 257455249. The next prime is 257455273. The reversal of 257455263 is 362554752.

It is a happy number.

It is not a de Polignac number, because 257455263 - 2⁶ = 257455199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257455223) 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 15 ways as a sum of consecutive naturals, for example, 172981 + ... + 174462.

It is an arithmetic number, because the mean of its divisors is an integer number (24321080).

Almost surely, 2^257455263 is an apocalyptic number.

257455263 is a deficient number, since it is larger than the sum of its proper divisors (131682017).

257455263 is a wasteful number, since it uses less digits than its factorization.

257455263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347478.

The product of its digits is 252000, while the sum is 39.

The square root of 257455263 is about 16045.4125219640. The cubic root of 257455263 is about 636.1613179059.

The spelling of 257455263 in words is "two hundred fifty-seven million, four hundred fifty-five thousand, two hundred sixty-three".