25091543 has 2 divisors, whose sum is σ = 25091544. Its totient is φ = 25091542.

The previous prime is 25091509. The next prime is 25091569. The reversal of 25091543 is 34519052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25091543 - 2¹⁰ = 25090519 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25091243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12545771 + 12545772.

It is an arithmetic number, because the mean of its divisors is an integer number (12545772).

Almost surely, 2^25091543 is an apocalyptic number.

25091543 is a deficient number, since it is larger than the sum of its proper divisors (1).

25091543 is an equidigital number, since it uses as much as digits as its factorization.

25091543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 25091543 is about 5009.1459351870. The cubic root of 25091543 is about 292.7582368931.

The spelling of 25091543 in words is "twenty-five million, ninety-one thousand, five hundred forty-three".