257105223 has 6 divisors (see below), whose sum is σ = 371374224. Its totient is φ = 171403476.

The previous prime is 257105183. The next prime is 257105257. The reversal of 257105223 is 322501752.

It is not a de Polignac number, because 257105223 - 2¹² = 257101127 is a prime.

It is a super-2 number, since 2×257105223² = 132206191387759458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257105273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14283615 + ... + 14283632.

It is an arithmetic number, because the mean of its divisors is an integer number (61895704).

Almost surely, 2^257105223 is an apocalyptic number.

257105223 is a deficient number, since it is larger than the sum of its proper divisors (114269001).

257105223 is a wasteful number, since it uses less digits than its factorization.

257105223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28567253 (or 28567250 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 257105223 is about 16034.5010212354. The cubic root of 257105223 is about 635.8728756837.

Adding to 257105223 its reverse (322501752), we get a palindrome (579606975).

The spelling of 257105223 in words is "two hundred fifty-seven million, one hundred five thousand, two hundred twenty-three".