2543505403 has 2 divisors, whose sum is σ = 2543505404. Its totient is φ = 2543505402.

The previous prime is 2543505401. The next prime is 2543505431. The reversal of 2543505403 is 3045053452.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2543505403 - 2¹ = 2543505401 is a prime.

Together with 2543505401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2543505401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271752701 + 1271752702.

It is an arithmetic number, because the mean of its divisors is an integer number (1271752702).

Almost surely, 2^2543505403 is an apocalyptic number.

2543505403 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543505403 is an equidigital number, since it uses as much as digits as its factorization.

2543505403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 31.

The square root of 2543505403 is about 50433.1776016543. The cubic root of 2543505403 is about 1365.0363657251.

Adding to 2543505403 its reverse (3045053452), we get a palindrome (5588558855).

The spelling of 2543505403 in words is "two billion, five hundred forty-three million, five hundred five thousand, four hundred three".