255420609 has 4 divisors (see below), whose sum is σ = 340560816. Its totient is φ = 170280404.

The previous prime is 255420593. The next prime is 255420647. The reversal of 255420609 is 906024552.

255420609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255420609 - 2⁴ = 255420593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255420609.

It is not an unprimeable number, because it can be changed into a prime (255421609) 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, 42570099 + ... + 42570104.

It is an arithmetic number, because the mean of its divisors is an integer number (85140204).

Almost surely, 2^255420609 is an apocalyptic number.

It is an amenable number.

255420609 is a deficient number, since it is larger than the sum of its proper divisors (85140207).

255420609 is an equidigital number, since it uses as much as digits as its factorization.

255420609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85140206.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 255420609 is about 15981.8837750748. The cubic root of 255420609 is about 634.4810350519.

The spelling of 255420609 in words is "two hundred fifty-five million, four hundred twenty thousand, six hundred nine".