256042311 has 16 divisors (see below), whose sum is σ = 397522944. Its totient is φ = 143548704.

The previous prime is 256042291. The next prime is 256042313. The reversal of 256042311 is 113240652.

It is not a de Polignac number, because 256042311 - 2¹⁰ = 256041287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256042313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113911 + ... + 116136.

It is an arithmetic number, because the mean of its divisors is an integer number (24845184).

Almost surely, 2^256042311 is an apocalyptic number.

256042311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

256042311 is a deficient number, since it is larger than the sum of its proper divisors (141480633).

256042311 is a wasteful number, since it uses less digits than its factorization.

256042311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230110.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 256042311 is about 16001.3221641213. The cubic root of 256042311 is about 634.9954003842.

Adding to 256042311 its reverse (113240652), we get a palindrome (369282963).

The spelling of 256042311 in words is "two hundred fifty-six million, forty-two thousand, three hundred eleven".