256138483 has 2 divisors, whose sum is σ = 256138484. Its totient is φ = 256138482.

The previous prime is 256138481. The next prime is 256138499. The reversal of 256138483 is 384831652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256138483 - 2¹ = 256138481 is a prime.

Together with 256138481, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (256138481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128069241 + 128069242.

It is an arithmetic number, because the mean of its divisors is an integer number (128069242).

Almost surely, 2^256138483 is an apocalyptic number.

256138483 is a deficient number, since it is larger than the sum of its proper divisors (1).

256138483 is an equidigital number, since it uses as much as digits as its factorization.

256138483 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 40.

The square root of 256138483 is about 16004.3270086561. The cubic root of 256138483 is about 635.0748939296.

The spelling of 256138483 in words is "two hundred fifty-six million, one hundred thirty-eight thousand, four hundred eighty-three".