25516003 has 2 divisors, whose sum is σ = 25516004. Its totient is φ = 25516002.

The previous prime is 25515991. The next prime is 25516009. The reversal of 25516003 is 30061552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25516003 - 2⁹ = 25515491 is a prime.

It is not a weakly prime, because it can be changed into another prime (25516009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12758001 + 12758002.

It is an arithmetic number, because the mean of its divisors is an integer number (12758002).

Almost surely, 2^25516003 is an apocalyptic number.

25516003 is a deficient number, since it is larger than the sum of its proper divisors (1).

25516003 is an equidigital number, since it uses as much as digits as its factorization.

25516003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 25516003 is about 5051.3367537712. The cubic root of 25516003 is about 294.3998254555.

Adding to 25516003 its reverse (30061552), we get a palindrome (55577555).

The spelling of 25516003 in words is "twenty-five million, five hundred sixteen thousand, three".