257163223 has 2 divisors, whose sum is σ = 257163224. Its totient is φ = 257163222.

The previous prime is 257163217. The next prime is 257163227. The reversal of 257163223 is 322361752.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257163223 is a prime.

It is a super-2 number, since 2×257163223² = 132265846527495458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257163227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128581611 + 128581612.

It is an arithmetic number, because the mean of its divisors is an integer number (128581612).

Almost surely, 2^257163223 is an apocalyptic number.

257163223 is a deficient number, since it is larger than the sum of its proper divisors (1).

257163223 is an equidigital number, since it uses as much as digits as its factorization.

257163223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

The square root of 257163223 is about 16036.3095193377. The cubic root of 257163223 is about 635.9206873065.

The spelling of 257163223 in words is "two hundred fifty-seven million, one hundred sixty-three thousand, two hundred twenty-three".