2543505431 has 2 divisors, whose sum is σ = 2543505432. Its totient is φ = 2543505430.

The previous prime is 2543505403. The next prime is 2543505443. The reversal of 2543505431 is 1345053452.

It is a happy number.

2543505431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2543505431 is a prime.

It is a super-2 number, since 2×2543505431² = 12938839755052991522, which contains 22 as substring.

It is a congruent number.

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, 1271752715 + 1271752716.

It is an arithmetic number, because the mean of its divisors is an integer number (1271752716).

Almost surely, 2^2543505431 is an apocalyptic number.

2543505431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543505431 is an equidigital number, since it uses as much as digits as its factorization.

2543505431 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 32.

The square root of 2543505431 is about 50433.1778792493. The cubic root of 2543505431 is about 1365.0363707341.

Adding to 2543505431 its reverse (1345053452), we get a palindrome (3888558883).

The spelling of 2543505431 in words is "two billion, five hundred forty-three million, five hundred five thousand, four hundred thirty-one".