257560213 has 2 divisors, whose sum is σ = 257560214. Its totient is φ = 257560212.

The previous prime is 257560139. The next prime is 257560229. The reversal of 257560213 is 312065752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217326564 + 40233649 = 14742^2 + 6343^2 .

It is a cyclic number.

It is not a de Polignac number, because 257560213 - 2¹³ = 257552021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257560243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128780106 + 128780107.

It is an arithmetic number, because the mean of its divisors is an integer number (128780107).

Almost surely, 2^257560213 is an apocalyptic number.

It is an amenable number.

257560213 is a deficient number, since it is larger than the sum of its proper divisors (1).

257560213 is an equidigital number, since it uses as much as digits as its factorization.

257560213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 257560213 is about 16048.6825939078. The cubic root of 257560213 is about 636.2477485340.

The spelling of 257560213 in words is "two hundred fifty-seven million, five hundred sixty thousand, two hundred thirteen".