256223064 has 16 divisors (see below), whose sum is σ = 640557720. Its totient is φ = 85407680.

The previous prime is 256222979. The next prime is 256223069. The reversal of 256223064 is 460322652.

It is a super-3 number, since 3×256223064³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256223069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5337957 + ... + 5338004.

Almost surely, 2^256223064 is an apocalyptic number.

256223064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256223064 is an abundant number, since it is smaller than the sum of its proper divisors (384334656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256223064 is a wasteful number, since it uses less digits than its factorization.

256223064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10675970 (or 10675966 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 256223064 is about 16006.9692321813. The cubic root of 256223064 is about 635.1447901793.

The spelling of 256223064 in words is "two hundred fifty-six million, two hundred twenty-three thousand, sixty-four".