257388612227 has 2 divisors, whose sum is σ = 257388612228. Its totient is φ = 257388612226.

The previous prime is 257388612199. The next prime is 257388612233. The reversal of 257388612227 is 722216883752.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257388612227 - 2¹⁰ = 257388611203 is a prime.

It is not a weakly prime, because it can be changed into another prime (257388612287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128694306113 + 128694306114.

It is an arithmetic number, because the mean of its divisors is an integer number (128694306114).

Almost surely, 2^257388612227 is an apocalyptic number.

257388612227 is a deficient number, since it is larger than the sum of its proper divisors (1).

257388612227 is an equidigital number, since it uses as much as digits as its factorization.

257388612227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4515840, while the sum is 53.

The spelling of 257388612227 in words is "two hundred fifty-seven billion, three hundred eighty-eight million, six hundred twelve thousand, two hundred twenty-seven".