255018621 has 16 divisors (see below), whose sum is σ = 399470400. Its totient is φ = 142667520.

The previous prime is 255018611. The next prime is 255018623. The reversal of 255018621 is 126810552.

It is not a de Polignac number, because 255018621 - 2²¹ = 252921469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255018623) 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 15 ways as a sum of consecutive naturals, for example, 296796 + ... + 297653.

It is an arithmetic number, because the mean of its divisors is an integer number (24966900).

Almost surely, 2^255018621 is an apocalyptic number.

It is an amenable number.

255018621 is a deficient number, since it is larger than the sum of its proper divisors (144451779).

255018621 is a wasteful number, since it uses less digits than its factorization.

255018621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594476.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 255018621 is about 15969.3024581539. The cubic root of 255018621 is about 634.1480056956.

The spelling of 255018621 in words is "two hundred fifty-five million, eighteen thousand, six hundred twenty-one".