255493389 has 4 divisors (see below), whose sum is σ = 340657856. Its totient is φ = 170328924.

The previous prime is 255493387. The next prime is 255493397. The reversal of 255493389 is 983394552.

255493389 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 not a de Polignac number, because 255493389 - 2¹ = 255493387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255493387) 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, 42582229 + ... + 42582234.

It is an arithmetic number, because the mean of its divisors is an integer number (85164464).

Almost surely, 2^255493389 is an apocalyptic number.

It is an amenable number.

255493389 is a deficient number, since it is larger than the sum of its proper divisors (85164467).

255493389 is an equidigital number, since it uses as much as digits as its factorization.

255493389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85164466.

The product of its digits is 1166400, while the sum is 48.

The square root of 255493389 is about 15984.1605660103. The cubic root of 255493389 is about 634.5412927116.

The spelling of 255493389 in words is "two hundred fifty-five million, four hundred ninety-three thousand, three hundred eighty-nine".