255330401 has 4 divisors (see below), whose sum is σ = 255363732. Its totient is φ = 255297072.

The previous prime is 255330391. The next prime is 255330443. The reversal of 255330401 is 104033552.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 237899776 + 17430625 = 15424^2 + 4175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255330401 is a prime.

It is a super-2 number, since 2×255330401² = 130387227349641602, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (255336401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1235 + ... + 22631.

It is an arithmetic number, because the mean of its divisors is an integer number (63840933).

Almost surely, 2^255330401 is an apocalyptic number.

It is an amenable number.

255330401 is a deficient number, since it is larger than the sum of its proper divisors (33331).

255330401 is a wasteful number, since it uses less digits than its factorization.

255330401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33330.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 255330401 is about 15979.0613303786. The cubic root of 255330401 is about 634.4063321207.

Adding to 255330401 its reverse (104033552), we get a palindrome (359363953).

The spelling of 255330401 in words is "two hundred fifty-five million, three hundred thirty thousand, four hundred one".