256057007 has 2 divisors, whose sum is σ = 256057008. Its totient is φ = 256057006.

The previous prime is 256057003. The next prime is 256057033. The reversal of 256057007 is 700750652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256057007 - 2² = 256057003 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256057003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128028503 + 128028504.

It is an arithmetic number, because the mean of its divisors is an integer number (128028504).

Almost surely, 2^256057007 is an apocalyptic number.

256057007 is a deficient number, since it is larger than the sum of its proper divisors (1).

256057007 is an equidigital number, since it uses as much as digits as its factorization.

256057007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 256057007 is about 16001.7813695851. The cubic root of 256057007 is about 635.0075490454.

The spelling of 256057007 in words is "two hundred fifty-six million, fifty-seven thousand, seven".