2563543 has 2 divisors, whose sum is σ = 2563544. Its totient is φ = 2563542.

The previous prime is 2563523. The next prime is 2563553. The reversal of 2563543 is 3453652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2563543 - 2¹⁷ = 2432471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2563523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1281771 + 1281772.

It is an arithmetic number, because the mean of its divisors is an integer number (1281772).

2^2563543 is an apocalyptic number.

2563543 is a deficient number, since it is larger than the sum of its proper divisors (1).

2563543 is an equidigital number, since it uses as much as digits as its factorization.

2563543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 28.

The square root of 2563543 is about 1601.1068046823. The cubic root of 2563543 is about 136.8611554424.

The spelling of 2563543 in words is "two million, five hundred sixty-three thousand, five hundred forty-three".