21525304345135 has 8 divisors (see below), whose sum is σ = 25835423080176. Its totient is φ = 17216871565440.

The previous prime is 21525304345121. The next prime is 21525304345183. The reversal of 21525304345135 is 53154340352512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21525304345135 - 2⁹ = 21525304344623 is a prime.

It is a super-2 number, since 2×21525304345135² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21525304345091 and 21525304345100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421460746 + ... + 421511815.

It is an arithmetic number, because the mean of its divisors is an integer number (3229427885022).

Almost surely, 2^{21525304345135} is an apocalyptic number.

21525304345135 is a deficient number, since it is larger than the sum of its proper divisors (4310118735041).

21525304345135 is an equidigital number, since it uses as much as digits as its factorization.

21525304345135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842977673.

The product of its (nonzero) digits is 1080000, while the sum is 43.

Adding to 21525304345135 its reverse (53154340352512), we get a palindrome (74679644697647).

The spelling of 21525304345135 in words is "twenty-one trillion, five hundred twenty-five billion, three hundred four million, three hundred forty-five thousand, one hundred thirty-five".