25251553 has 2 divisors, whose sum is σ = 25251554. Its totient is φ = 25251552.

The previous prime is 25251529. The next prime is 25251559. The reversal of 25251553 is 35515252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17918289 + 7333264 = 4233^2 + 2708^2 .

It is a cyclic number.

It is not a de Polignac number, because 25251553 - 2²¹ = 23154401 is a prime.

It is not a weakly prime, because it can be changed into another prime (25251559) 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, 12625776 + 12625777.

It is an arithmetic number, because the mean of its divisors is an integer number (12625777).

Almost surely, 2^25251553 is an apocalyptic number.

It is an amenable number.

25251553 is a deficient number, since it is larger than the sum of its proper divisors (1).

25251553 is an equidigital number, since it uses as much as digits as its factorization.

25251553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7500, while the sum is 28.

The square root of 25251553 is about 5025.0923374601. The cubic root of 25251553 is about 293.3792299339.

The spelling of 25251553 in words is "twenty-five million, two hundred fifty-one thousand, five hundred fifty-three".