255513405 has 16 divisors (see below), whose sum is σ = 467224704. Its totient is φ = 116806080.

The previous prime is 255513389. The next prime is 255513407. The reversal of 255513405 is 504315552.

It is a happy number.

It is not a de Polignac number, because 255513405 - 2⁴ = 255513389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255513407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1216626 + ... + 1216835.

It is an arithmetic number, because the mean of its divisors is an integer number (29201544).

Almost surely, 2^255513405 is an apocalyptic number.

It is an amenable number.

255513405 is a deficient number, since it is larger than the sum of its proper divisors (211711299).

255513405 is a wasteful number, since it uses less digits than its factorization.

255513405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433476.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 255513405 is about 15984.7866735844. The cubic root of 255513405 is about 634.5578628036.

Adding to 255513405 its reverse (504315552), we get a palindrome (759828957).

The spelling of 255513405 in words is "two hundred fifty-five million, five hundred thirteen thousand, four hundred five".