255140405 has 16 divisors (see below), whose sum is σ = 341092080. Its totient is φ = 181913088.

The previous prime is 255140401. The next prime is 255140407. The reversal of 255140405 is 504041552.

255140405 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 8 ways, for example, as 6195121 + 248945284 = 2489^2 + 15778^2 .

It is a cyclic number.

It is not a de Polignac number, because 255140405 - 2² = 255140401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255140401) 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, 65792 + ... + 69561.

It is an arithmetic number, because the mean of its divisors is an integer number (21318255).

Almost surely, 2^255140405 is an apocalyptic number.

It is an amenable number.

255140405 is a deficient number, since it is larger than the sum of its proper divisors (85951675).

255140405 is a wasteful number, since it uses less digits than its factorization.

255140405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135400.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 255140405 is about 15973.1150687648. The cubic root of 255140405 is about 634.2489353063.

Adding to 255140405 its reverse (504041552), we get a palindrome (759181957).

The spelling of 255140405 in words is "two hundred fifty-five million, one hundred forty thousand, four hundred five".