255530405 has 16 divisors (see below), whose sum is σ = 330825600. Its totient is φ = 188355648.

The previous prime is 255530377. The next prime is 255530413. The reversal of 255530405 is 504035552.

It is a happy number.

It is not a de Polignac number, because 255530405 - 2¹⁰ = 255529381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35654 + ... + 42216.

It is an arithmetic number, because the mean of its divisors is an integer number (20676600).

Almost surely, 2^255530405 is an apocalyptic number.

It is an amenable number.

255530405 is a deficient number, since it is larger than the sum of its proper divisors (75295195).

255530405 is a wasteful number, since it uses less digits than its factorization.

255530405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7180.

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 255530405 is about 15985.3184203506. The cubic root of 255530405 is about 634.5719354435.

Adding to 255530405 its reverse (504035552), we get a palindrome (759565957).

The spelling of 255530405 in words is "two hundred fifty-five million, five hundred thirty thousand, four hundred five".