257352357 has 4 divisors (see below), whose sum is σ = 343136480. Its totient is φ = 171568236.

The previous prime is 257352331. The next prime is 257352371. The reversal of 257352357 is 753253752.

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 257352357 - 2⁸ = 257352101 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 (257352157) 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, 42892057 + ... + 42892062.

It is an arithmetic number, because the mean of its divisors is an integer number (85784120).

Almost surely, 2^257352357 is an apocalyptic number.

It is an amenable number.

257352357 is a deficient number, since it is larger than the sum of its proper divisors (85784123).

257352357 is an equidigital number, since it uses as much as digits as its factorization.

257352357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85784122.

The product of its digits is 220500, while the sum is 39.

The square root of 257352357 is about 16042.2054905178. The cubic root of 257352357 is about 636.0765477858.

The spelling of 257352357 in words is "two hundred fifty-seven million, three hundred fifty-two thousand, three hundred fifty-seven".