255242889 has 24 divisors (see below), whose sum is σ = 405291744. Its totient is φ = 153504000.

The previous prime is 255242887. The next prime is 255242899. The reversal of 255242889 is 988242552.

255242889 is a `hidden beast` number, since 25 + 524 + 28 + 89 = 666.

It is not a de Polignac number, because 255242889 - 2¹ = 255242887 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (255242887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3129 + ... + 22809.

It is an arithmetic number, because the mean of its divisors is an integer number (16887156).

Almost surely, 2^255242889 is an apocalyptic number.

It is an amenable number.

255242889 is a deficient number, since it is larger than the sum of its proper divisors (150048855).

255242889 is a wasteful number, since it uses less digits than its factorization.

255242889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19829 (or 19826 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 255242889 is about 15976.3227621377. The cubic root of 255242889 is about 634.3338449815. Note that the first 3 decimals are identical.

The spelling of 255242889 in words is "two hundred fifty-five million, two hundred forty-two thousand, eight hundred eighty-nine".