256511012 has 24 divisors (see below), whose sum is σ = 452928672. Its totient is φ = 127108800.

The previous prime is 256510999. The next prime is 256511023. The reversal of 256511012 is 210115652.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263687 + ... + 264657.

It is an arithmetic number, because the mean of its divisors is an integer number (18872028).

Almost surely, 2^256511012 is an apocalyptic number.

It is an amenable number.

256511012 is a deficient number, since it is larger than the sum of its proper divisors (196417660).

256511012 is a wasteful number, since it uses less digits than its factorization.

256511012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499 (or 1497 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 256511012 is about 16015.9611637891. The cubic root of 256511012 is about 635.3826300791.

Adding to 256511012 its reverse (210115652), we get a palindrome (466626664).

The spelling of 256511012 in words is "two hundred fifty-six million, five hundred eleven thousand, twelve".