21535241242325 has 24 divisors (see below), whose sum is σ = 27462025800000. Its totient is φ = 16742976687360.

The previous prime is 21535241242309. The next prime is 21535241242337. The reversal of 21535241242325 is 52324214253512.

It is not a de Polignac number, because 21535241242325 - 2⁴ = 21535241242309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50119700 + ... + 50547549.

It is an arithmetic number, because the mean of its divisors is an integer number (1144251075000).

Almost surely, 2^{21535241242325} is an apocalyptic number.

21535241242325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21535241242325 is a deficient number, since it is larger than the sum of its proper divisors (5926784557675).

21535241242325 is a wasteful number, since it uses less digits than its factorization.

21535241242325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100667501 (or 100667496 counting only the distinct ones).

The product of its digits is 576000, while the sum is 41.

Adding to 21535241242325 its reverse (52324214253512), we get a palindrome (73859455495837).

The spelling of 21535241242325 in words is "twenty-one trillion, five hundred thirty-five billion, two hundred forty-one million, two hundred forty-two thousand, three hundred twenty-five".