25553123 has 2 divisors, whose sum is σ = 25553124. Its totient is φ = 25553122.

The previous prime is 25553107. The next prime is 25553153. The reversal of 25553123 is 32135552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25553123 - 2⁴ = 25553107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25553092 and 25553101.

It is not a weakly prime, because it can be changed into another prime (25553153) 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, 12776561 + 12776562.

It is an arithmetic number, because the mean of its divisors is an integer number (12776562).

Almost surely, 2^25553123 is an apocalyptic number.

25553123 is a deficient number, since it is larger than the sum of its proper divisors (1).

25553123 is an equidigital number, since it uses as much as digits as its factorization.

25553123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4500, while the sum is 26.

The square root of 25553123 is about 5055.0096933636. The cubic root of 25553123 is about 294.5425179517.

Adding to 25553123 its reverse (32135552), we get a palindrome (57688675).

The spelling of 25553123 in words is "twenty-five million, five hundred fifty-three thousand, one hundred twenty-three".