256231741 has 2 divisors, whose sum is σ = 256231742. Its totient is φ = 256231740.

The previous prime is 256231699. The next prime is 256231747. The reversal of 256231741 is 147132652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233631225 + 22600516 = 15285^2 + 4754^2 .

It is a cyclic number.

It is not a de Polignac number, because 256231741 - 2¹³ = 256223549 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256231747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128115870 + 128115871.

It is an arithmetic number, because the mean of its divisors is an integer number (128115871).

Almost surely, 2^256231741 is an apocalyptic number.

It is an amenable number.

256231741 is a deficient number, since it is larger than the sum of its proper divisors (1).

256231741 is an equidigital number, since it uses as much as digits as its factorization.

256231741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 256231741 is about 16007.2402680787. The cubic root of 256231741 is about 635.1519598294.

The spelling of 256231741 in words is "two hundred fifty-six million, two hundred thirty-one thousand, seven hundred forty-one".