256124311 has 2 divisors, whose sum is σ = 256124312. Its totient is φ = 256124310.

The previous prime is 256124303. The next prime is 256124353. The reversal of 256124311 is 113421652.

It is a happy number.

256124311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256124311 - 2³ = 256124303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256124411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128062155 + 128062156.

It is an arithmetic number, because the mean of its divisors is an integer number (128062156).

Almost surely, 2^256124311 is an apocalyptic number.

256124311 is a deficient number, since it is larger than the sum of its proper divisors (1).

256124311 is an equidigital number, since it uses as much as digits as its factorization.

256124311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 256124311 is about 16003.8842472695. The cubic root of 256124311 is about 635.0631809332.

Adding to 256124311 its reverse (113421652), we get a palindrome (369545963).

The spelling of 256124311 in words is "two hundred fifty-six million, one hundred twenty-four thousand, three hundred eleven".