25543313 has 2 divisors, whose sum is σ = 25543314. Its totient is φ = 25543312.

The previous prime is 25543303. The next prime is 25543319. The reversal of 25543313 is 31334552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25482304 + 61009 = 5048^2 + 247^2 .

It is a cyclic number.

It is not a de Polignac number, because 25543313 - 2⁶ = 25543249 is a prime.

It is not a weakly prime, because it can be changed into another prime (25543319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12771656 + 12771657.

It is an arithmetic number, because the mean of its divisors is an integer number (12771657).

Almost surely, 2^25543313 is an apocalyptic number.

It is an amenable number.

25543313 is a deficient number, since it is larger than the sum of its proper divisors (1).

25543313 is an equidigital number, since it uses as much as digits as its factorization.

25543313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 26.

The square root of 25543313 is about 5054.0392756685. The cubic root of 25543313 is about 294.5048209034.

Adding to 25543313 its reverse (31334552), we get a palindrome (56877865).

The spelling of 25543313 in words is "twenty-five million, five hundred forty-three thousand, three hundred thirteen".