257471633 has 2 divisors, whose sum is σ = 257471634. Its totient is φ = 257471632.

The previous prime is 257471611. The next prime is 257471663. The reversal of 257471633 is 336174752.

257471633 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., 184334929 + 73136704 = 13577^2 + 8552^2 .

It is a cyclic number.

It is not a de Polignac number, because 257471633 - 2¹⁴ = 257455249 is a prime.

It is not a weakly prime, because it can be changed into another prime (257471663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128735816 + 128735817.

It is an arithmetic number, because the mean of its divisors is an integer number (128735817).

Almost surely, 2^257471633 is an apocalyptic number.

It is an amenable number.

257471633 is a deficient number, since it is larger than the sum of its proper divisors (1).

257471633 is an equidigital number, since it uses as much as digits as its factorization.

257471633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 38.

The square root of 257471633 is about 16045.9226285060. The cubic root of 257471633 is about 636.1748008181.

The spelling of 257471633 in words is "two hundred fifty-seven million, four hundred seventy-one thousand, six hundred thirty-three".