21310425525 has 12 divisors (see below), whose sum is σ = 35233236992. Its totient is φ = 11365560240.

The previous prime is 21310425509. The next prime is 21310425529. The reversal of 21310425525 is 52552401312.

It is not a de Polignac number, because 21310425525 - 2⁴ = 21310425509 is a prime.

It is a super-3 number, since 3×21310425525³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21310425492 and 21310425501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310425529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142069429 + ... + 142069578.

Almost surely, 2^21310425525 is an apocalyptic number.

21310425525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21310425525 is a deficient number, since it is larger than the sum of its proper divisors (13922811467).

21310425525 is a wasteful number, since it uses less digits than its factorization.

21310425525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284139020 (or 284139015 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 21310425525 its reverse (52552401312), we get a palindrome (73862826837).

The spelling of 21310425525 in words is "twenty-one billion, three hundred ten million, four hundred twenty-five thousand, five hundred twenty-five".