13450145521 has 4 divisors (see below), whose sum is σ = 13452102000. Its totient is φ = 13448189044.

The previous prime is 13450145497. The next prime is 13450145609. The reversal of 13450145521 is 12554105431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13450145521 - 2¹³ = 13450137329 is a prime.

It is a super-2 number, since 2×13450145521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13450175521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 967891 + ... + 981688.

It is an arithmetic number, because the mean of its divisors is an integer number (3363025500).

Almost surely, 2^13450145521 is an apocalyptic number.

It is an amenable number.

13450145521 is a deficient number, since it is larger than the sum of its proper divisors (1956479).

13450145521 is an equidigital number, since it uses as much as digits as its factorization.

13450145521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956478.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 13450145521 in words is "thirteen billion, four hundred fifty million, one hundred forty-five thousand, five hundred twenty-one".