257713223 has 2 divisors, whose sum is σ = 257713224. Its totient is φ = 257713222.

The previous prime is 257713219. The next prime is 257713237. The reversal of 257713223 is 322317752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257713223 - 2² = 257713219 is a prime.

It is a super-2 number, since 2×257713223² = 132832210618095458, 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 257713223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257713213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128856611 + 128856612.

It is an arithmetic number, because the mean of its divisors is an integer number (128856612).

Almost surely, 2^257713223 is an apocalyptic number.

257713223 is a deficient number, since it is larger than the sum of its proper divisors (1).

257713223 is an equidigital number, since it uses as much as digits as its factorization.

257713223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 32.

The square root of 257713223 is about 16053.4489440743. The cubic root of 257713223 is about 636.3737164841.

The spelling of 257713223 in words is "two hundred fifty-seven million, seven hundred thirteen thousand, two hundred twenty-three".