257821483 has 2 divisors, whose sum is σ = 257821484. Its totient is φ = 257821482.

The previous prime is 257821457. The next prime is 257821511. The reversal of 257821483 is 384128752.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257821483 - 2⁹ = 257820971 is a prime.

It is not a weakly prime, because it can be changed into another prime (257821423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128910741 + 128910742.

It is an arithmetic number, because the mean of its divisors is an integer number (128910742).

Almost surely, 2^257821483 is an apocalyptic number.

257821483 is a deficient number, since it is larger than the sum of its proper divisors (1).

257821483 is an equidigital number, since it uses as much as digits as its factorization.

257821483 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 40.

The square root of 257821483 is about 16056.8204511354. The cubic root of 257821483 is about 636.4628131591.

The spelling of 257821483 in words is "two hundred fifty-seven million, eight hundred twenty-one thousand, four hundred eighty-three".