25520293 has 2 divisors, whose sum is σ = 25520294. Its totient is φ = 25520292.

The previous prime is 25520291. The next prime is 25520309. The reversal of 25520293 is 39202552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20493729 + 5026564 = 4527^2 + 2242^2 .

It is a cyclic number.

It is not a de Polignac number, because 25520293 - 2¹ = 25520291 is a prime.

Together with 25520291, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25520291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12760146 + 12760147.

It is an arithmetic number, because the mean of its divisors is an integer number (12760147).

Almost surely, 2^25520293 is an apocalyptic number.

It is an amenable number.

25520293 is a deficient number, since it is larger than the sum of its proper divisors (1).

25520293 is an equidigital number, since it uses as much as digits as its factorization.

25520293 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 28.

The square root of 25520293 is about 5051.7613759955. The cubic root of 25520293 is about 294.4163236570.

It can be divided in two parts, 255 and 20293, that multiplied together give a palindrome (5174715).

The spelling of 25520293 in words is "twenty-five million, five hundred twenty thousand, two hundred ninety-three".