257525383 has 4 divisors (see below), whose sum is σ = 261890280. Its totient is φ = 253160488.

The previous prime is 257525381. The next prime is 257525399. The reversal of 257525383 is 383525752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 257525383 - 2¹ = 257525381 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 (257525381) 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, 2182360 + ... + 2182477.

It is an arithmetic number, because the mean of its divisors is an integer number (65472570).

Almost surely, 2^257525383 is an apocalyptic number.

257525383 is a deficient number, since it is larger than the sum of its proper divisors (4364897).

257525383 is an equidigital number, since it uses as much as digits as its factorization.

257525383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4364896.

The product of its digits is 252000, while the sum is 40.

The square root of 257525383 is about 16047.5974214211. The cubic root of 257525383 is about 636.2190672044.

The spelling of 257525383 in words is "two hundred fifty-seven million, five hundred twenty-five thousand, three hundred eighty-three".