257163323 has 2 divisors, whose sum is σ = 257163324. Its totient is φ = 257163322.

The previous prime is 257163317. The next prime is 257163341. The reversal of 257163323 is 323361752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257163323 - 2¹⁰ = 257162299 is a prime.

It is a super-2 number, since 2×257163323² = 132265949392804658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 257163323.

It is not a weakly prime, because it can be changed into another prime (257163223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128581661 + 128581662.

It is an arithmetic number, because the mean of its divisors is an integer number (128581662).

Almost surely, 2^257163323 is an apocalyptic number.

257163323 is a deficient number, since it is larger than the sum of its proper divisors (1).

257163323 is an equidigital number, since it uses as much as digits as its factorization.

257163323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 32.

The square root of 257163323 is about 16036.3126372617. The cubic root of 257163323 is about 635.9207697341.

The spelling of 257163323 in words is "two hundred fifty-seven million, one hundred sixty-three thousand, three hundred twenty-three".