13225315066521 has 8 divisors (see below), whose sum is σ = 17633786057760. Its totient is φ = 8816860393152.

The previous prime is 13225315066507. The next prime is 13225315066543. The reversal of 13225315066521 is 12566051352231.

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

It is not a de Polignac number, because 13225315066521 - 2⁹ = 13225315066009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13225315046521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2043135 + ... + 5533988.

It is an arithmetic number, because the mean of its divisors is an integer number (2204223257220).

Almost surely, 2^{13225315066521} is an apocalyptic number.

It is an amenable number.

13225315066521 is a deficient number, since it is larger than the sum of its proper divisors (4408470991239).

13225315066521 is an equidigital number, since it uses as much as digits as its factorization.

13225315066521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8158935.

The product of its (nonzero) digits is 324000, while the sum is 42.

The spelling of 13225315066521 in words is "thirteen trillion, two hundred twenty-five billion, three hundred fifteen million, sixty-six thousand, five hundred twenty-one".