256045311 has 12 divisors (see below), whose sum is σ = 389308920. Its totient is φ = 161712720.

The previous prime is 256045303. The next prime is 256045319. The reversal of 256045311 is 113540652.

256045311 is a `hidden beast` number, since 2 + 5 + 604 + 53 + 1 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (256045303) and next prime (256045319).

It is not a de Polignac number, because 256045311 - 2³ = 256045303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256045319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 748500 + ... + 748841.

It is an arithmetic number, because the mean of its divisors is an integer number (32442410).

Almost surely, 2^256045311 is an apocalyptic number.

256045311 is a deficient number, since it is larger than the sum of its proper divisors (133263609).

256045311 is a wasteful number, since it uses less digits than its factorization.

256045311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497366 (or 1497363 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 256045311 is about 16001.4159061003. The cubic root of 256045311 is about 634.9978804154.

Adding to 256045311 its reverse (113540652), we get a palindrome (369585963).

The spelling of 256045311 in words is "two hundred fifty-six million, forty-five thousand, three hundred eleven".