25516001 has 4 divisors (see below), whose sum is σ = 29161152. Its totient is φ = 21870852.

The previous prime is 25515991. The next prime is 25516003. The reversal of 25516001 is 10061552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25516001 - 2⁶ = 25515937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25516003) 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 in 3 ways as a sum of consecutive naturals, for example, 1822565 + ... + 1822578.

It is an arithmetic number, because the mean of its divisors is an integer number (7290288).

Almost surely, 2^25516001 is an apocalyptic number.

It is an amenable number.

25516001 is a deficient number, since it is larger than the sum of its proper divisors (3645151).

25516001 is an equidigital number, since it uses as much as digits as its factorization.

25516001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645150.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 25516001 is about 5051.3365558038. The cubic root of 25516001 is about 294.3998177636.

Adding to 25516001 its reverse (10061552), we get a palindrome (35577553).

The spelling of 25516001 in words is "twenty-five million, five hundred sixteen thousand, one".