257205553 has 12 divisors (see below), whose sum is σ = 290607408. Its totient is φ = 225752240.

The previous prime is 257205517. The next prime is 257205589. The reversal of 257205553 is 355502752.

257205553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (257205517) and next prime (257205589).

It is not a de Polignac number, because 257205553 - 2⁹ = 257205041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257205253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4651 + ... + 23152.

It is an arithmetic number, because the mean of its divisors is an integer number (24217284).

Almost surely, 2^257205553 is an apocalyptic number.

It is an amenable number.

257205553 is a deficient number, since it is larger than the sum of its proper divisors (33401855).

257205553 is a wasteful number, since it uses less digits than its factorization.

257205553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27872 (or 27843 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 34.

The square root of 257205553 is about 16037.6292824095. The cubic root of 257205553 is about 635.9555770101.

The spelling of 257205553 in words is "two hundred fifty-seven million, two hundred five thousand, five hundred fifty-three".