256850801 has 2 divisors, whose sum is σ = 256850802. Its totient is φ = 256850800.

The previous prime is 256850749. The next prime is 256850813. The reversal of 256850801 is 108058652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256800625 + 50176 = 16025^2 + 224^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256850801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256850861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128425400 + 128425401.

It is an arithmetic number, because the mean of its divisors is an integer number (128425401).

Almost surely, 2^256850801 is an apocalyptic number.

It is an amenable number.

256850801 is a deficient number, since it is larger than the sum of its proper divisors (1).

256850801 is an equidigital number, since it uses as much as digits as its factorization.

256850801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 256850801 is about 16026.5654773567. The cubic root of 256850801 is about 635.6630608847.

The spelling of 256850801 in words is "two hundred fifty-six million, eight hundred fifty thousand, eight hundred one".