255644433 has 48 divisors (see below), whose sum is σ = 418421952. Its totient is φ = 149040000.

The previous prime is 255644423. The next prime is 255644437. The reversal of 255644433 is 334446552.

255644433 is a `hidden beast` number, since 2 + 5 + 5 + 644 + 4 + 3 + 3 = 666.

It is not a de Polignac number, because 255644433 - 2⁶ = 255644369 is a prime.

It is a super-2 number, since 2×255644433² = 130708152247782978, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (255644437) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 369618 + ... + 370308.

It is an arithmetic number, because the mean of its divisors is an integer number (8717124).

Almost surely, 2^255644433 is an apocalyptic number.

It is an amenable number.

255644433 is a deficient number, since it is larger than the sum of its proper divisors (162777519).

255644433 is a wasteful number, since it uses less digits than its factorization.

255644433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846 (or 843 counting only the distinct ones).

The product of its digits is 172800, while the sum is 36.

The square root of 255644433 is about 15988.8846702952. The cubic root of 255644433 is about 634.6663119596. Note that the first 3 decimals are identical.

The spelling of 255644433 in words is "two hundred fifty-five million, six hundred forty-four thousand, four hundred thirty-three".