25510553 has 2 divisors, whose sum is σ = 25510554. Its totient is φ = 25510552.

The previous prime is 25510477. The next prime is 25510561. The reversal of 25510553 is 35501552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13344409 + 12166144 = 3653^2 + 3488^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25510553 is a prime.

It is not a weakly prime, because it can be changed into another prime (25510453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12755276 + 12755277.

It is an arithmetic number, because the mean of its divisors is an integer number (12755277).

Almost surely, 2^25510553 is an apocalyptic number.

It is an amenable number.

25510553 is a deficient number, since it is larger than the sum of its proper divisors (1).

25510553 is an equidigital number, since it uses as much as digits as its factorization.

25510553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 25510553 is about 5050.7972637991. The cubic root of 25510553 is about 294.3788635348.

Subtracting 25510553 from its reverse (35501552), we obtain a palindrome (9990999).

The spelling of 25510553 in words is "twenty-five million, five hundred ten thousand, five hundred fifty-three".