257851253 has 4 divisors (see below), whose sum is σ = 281292288. Its totient is φ = 234410220.

The previous prime is 257851241. The next prime is 257851277. The reversal of 257851253 is 352158752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 257851253 - 2⁸ = 257850997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257851213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11720501 + ... + 11720522.

It is an arithmetic number, because the mean of its divisors is an integer number (70323072).

Almost surely, 2^257851253 is an apocalyptic number.

It is an amenable number.

257851253 is a deficient number, since it is larger than the sum of its proper divisors (23441035).

257851253 is a wasteful number, since it uses less digits than its factorization.

257851253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23441034.

The product of its digits is 84000, while the sum is 38.

The square root of 257851253 is about 16057.7474447695. The cubic root of 257851253 is about 636.4873091379.

The spelling of 257851253 in words is "two hundred fifty-seven million, eight hundred fifty-one thousand, two hundred fifty-three".