2543505405 has 32 divisors (see below), whose sum is σ = 4924571904. Its totient is φ = 1094347776.

The previous prime is 2543505403. The next prime is 2543505431. The reversal of 2543505405 is 5045053452.

It is not a de Polignac number, because 2543505405 - 2¹ = 2543505403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543505401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 710682 + ... + 714251.

It is an arithmetic number, because the mean of its divisors is an integer number (153892872).

Almost surely, 2^2543505405 is an apocalyptic number.

It is an amenable number.

2543505405 is a deficient number, since it is larger than the sum of its proper divisors (2381066499).

2543505405 is a wasteful number, since it uses less digits than its factorization.

2543505405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424965.

The product of its (nonzero) digits is 60000, while the sum is 33.

The square root of 2543505405 is about 50433.1776214825. The cubic root of 2543505405 is about 1365.0363660829.

Adding to 2543505405 its reverse (5045053452), we get a palindrome (7588558857).

The spelling of 2543505405 in words is "two billion, five hundred forty-three million, five hundred five thousand, four hundred five".