257302273 has 2 divisors, whose sum is σ = 257302274. Its totient is φ = 257302272.

The previous prime is 257302271. The next prime is 257302277. The reversal of 257302273 is 372203752.

257302273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236298384 + 21003889 = 15372^2 + 4583^2 .

It is a cyclic number.

It is not a de Polignac number, because 257302273 - 2¹ = 257302271 is a prime.

Together with 257302271, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (257302271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128651136 + 128651137.

It is an arithmetic number, because the mean of its divisors is an integer number (128651137).

Almost surely, 2^257302273 is an apocalyptic number.

It is an amenable number.

257302273 is a deficient number, since it is larger than the sum of its proper divisors (1).

257302273 is an equidigital number, since it uses as much as digits as its factorization.

257302273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 31.

The square root of 257302273 is about 16040.6444072550. The cubic root of 257302273 is about 636.0352822812.

The spelling of 257302273 in words is "two hundred fifty-seven million, three hundred two thousand, two hundred seventy-three".