21535003500325 has 12 divisors (see below), whose sum is σ = 30518176389280. Its totient is φ = 14766859542960.

The previous prime is 21535003500289. The next prime is 21535003500337. The reversal of 21535003500325 is 52300530053512.

It is not a de Polignac number, because 21535003500325 - 2⁹ = 21535003499813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61528581255 + ... + 61528581604.

Almost surely, 2^{21535003500325} is an apocalyptic number.

21535003500325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21535003500325 is a deficient number, since it is larger than the sum of its proper divisors (8983172888955).

21535003500325 is a wasteful number, since it uses less digits than its factorization.

21535003500325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123057162876 (or 123057162871 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 34.

Adding to 21535003500325 its reverse (52300530053512), we get a palindrome (73835533553837).

The spelling of 21535003500325 in words is "twenty-one trillion, five hundred thirty-five billion, three million, five hundred thousand, three hundred twenty-five".