255531644 has 12 divisors (see below), whose sum is σ = 462600600. Its totient is φ = 123360048.

The previous prime is 255531631. The next prime is 255531649. The reversal of 255531644 is 446135552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255531649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1101314 + ... + 1101545.

It is an arithmetic number, because the mean of its divisors is an integer number (38550050).

Almost surely, 2^255531644 is an apocalyptic number.

It is an amenable number.

255531644 is a deficient number, since it is larger than the sum of its proper divisors (207068956).

255531644 is a wasteful number, since it uses less digits than its factorization.

255531644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202892 (or 2202890 counting only the distinct ones).

The product of its digits is 72000, while the sum is 35.

The square root of 255531644 is about 15985.3571746145. The cubic root of 255531644 is about 634.5729610662.

The spelling of 255531644 in words is "two hundred fifty-five million, five hundred thirty-one thousand, six hundred forty-four".