255432321 has 12 divisors (see below), whose sum is σ = 369234580. Its totient is φ = 170160480.

The previous prime is 255432313. The next prime is 255432323. The reversal of 255432321 is 123234552.

It is a happy number.

255432321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8785296 + 246647025 = 2964^2 + 15705^2 .

It is not a de Polignac number, because 255432321 - 2³ = 255432313 is a prime.

It is a super-2 number, since 2×255432321² = 130491341222894082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255432323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2931 + ... + 22791.

Almost surely, 2^255432321 is an apocalyptic number.

It is an amenable number.

255432321 is a deficient number, since it is larger than the sum of its proper divisors (113802259).

255432321 is a wasteful number, since it uses less digits than its factorization.

255432321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21296 (or 21293 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 255432321 is about 15982.2501857529. The cubic root of 255432321 is about 634.4907326879.

Adding to 255432321 its reverse (123234552), we get a palindrome (378666873).

The spelling of 255432321 in words is "two hundred fifty-five million, four hundred thirty-two thousand, three hundred twenty-one".