257133211 has 8 divisors (see below), whose sum is σ = 272430000. Its totient is φ = 241855488.

The previous prime is 257133209. The next prime is 257133257. The reversal of 257133211 is 112331752.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257133211 - 2¹ = 257133209 is a prime.

It is a super-2 number, since 2×257133211² = 132234976398341042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257133281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30540 + ... + 38038.

It is an arithmetic number, because the mean of its divisors is an integer number (34053750).

Almost surely, 2^257133211 is an apocalyptic number.

257133211 is a deficient number, since it is larger than the sum of its proper divisors (15296789).

257133211 is a wasteful number, since it uses less digits than its factorization.

257133211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9533.

The product of its digits is 1260, while the sum is 25.

The square root of 257133211 is about 16035.3737405774. The cubic root of 257133211 is about 635.8959481623.

Adding to 257133211 its reverse (112331752), we get a palindrome (369464963).

The spelling of 257133211 in words is "two hundred fifty-seven million, one hundred thirty-three thousand, two hundred eleven".