25391533 has 2 divisors, whose sum is σ = 25391534. Its totient is φ = 25391532.

The previous prime is 25391479. The next prime is 25391551. The reversal of 25391533 is 33519352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25371369 + 20164 = 5037^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 25391533 - 2⁹ = 25391021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25391495 and 25391504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25391033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12695766 + 12695767.

It is an arithmetic number, because the mean of its divisors is an integer number (12695767).

Almost surely, 2^25391533 is an apocalyptic number.

It is an amenable number.

25391533 is a deficient number, since it is larger than the sum of its proper divisors (1).

25391533 is an equidigital number, since it uses as much as digits as its factorization.

25391533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12150, while the sum is 31.

The square root of 25391533 is about 5039.0011907123. The cubic root of 25391533 is about 293.9203395326.

The spelling of 25391533 in words is "twenty-five million, three hundred ninety-one thousand, five hundred thirty-three".