257279351 has 12 divisors (see below), whose sum is σ = 299675448. Its totient is φ = 220236912.

The previous prime is 257279327. The next prime is 257279369. The reversal of 257279351 is 153972752.

It is not a de Polignac number, because 257279351 - 2¹⁰ = 257278327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257279299 and 257279308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257279381) 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, 39980 + ... + 45966.

It is an arithmetic number, because the mean of its divisors is an integer number (24972954).

Almost surely, 2^257279351 is an apocalyptic number.

257279351 is a deficient number, since it is larger than the sum of its proper divisors (42396097).

257279351 is an equidigital number, since it uses as much as digits as its factorization.

257279351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6878 (or 6871 counting only the distinct ones).

The product of its digits is 132300, while the sum is 41.

The square root of 257279351 is about 16039.9298938618. The cubic root of 257279351 is about 636.0163944655.

The spelling of 257279351 in words is "two hundred fifty-seven million, two hundred seventy-nine thousand, three hundred fifty-one".