25575553 has 2 divisors, whose sum is σ = 25575554. Its totient is φ = 25575552.

The previous prime is 25575551. The next prime is 25575569. The reversal of 25575553 is 35557552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25573249 + 2304 = 5057^2 + 48^2 .

It is a cyclic number.

It is not a de Polignac number, because 25575553 - 2¹ = 25575551 is a prime.

It is a super-2 number, since 2×25575553² = 1308217822511618, which contains 22 as substring.

Together with 25575551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25575551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12787776 + 12787777.

It is an arithmetic number, because the mean of its divisors is an integer number (12787777).

Almost surely, 2^25575553 is an apocalyptic number.

It is an amenable number.

25575553 is a deficient number, since it is larger than the sum of its proper divisors (1).

25575553 is an equidigital number, since it uses as much as digits as its factorization.

25575553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131250, while the sum is 37.

The square root of 25575553 is about 5057.2277979146. The cubic root of 25575553 is about 294.6286738472.

The spelling of 25575553 in words is "twenty-five million, five hundred seventy-five thousand, five hundred fifty-three".