257135318 has 16 divisors (see below), whose sum is σ = 421754256. Its totient is φ = 116605440.

The previous prime is 257135293. The next prime is 257135321. The reversal of 257135318 is 813531752.

It is a super-2 number, since 2×257135318² = 132237143525922248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3971 + ... + 23022.

It is an arithmetic number, because the mean of its divisors is an integer number (26359641).

Almost surely, 2^257135318 is an apocalyptic number.

257135318 is a deficient number, since it is larger than the sum of its proper divisors (164618938).

257135318 is a wasteful number, since it uses less digits than its factorization.

257135318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27439.

The product of its digits is 25200, while the sum is 35.

The square root of 257135318 is about 16035.4394389427. The cubic root of 257135318 is about 635.8976850430.

The spelling of 257135318 in words is "two hundred fifty-seven million, one hundred thirty-five thousand, three hundred eighteen".