13220550451 has 4 divisors (see below), whose sum is σ = 13221282712. Its totient is φ = 13219818192.

The previous prime is 13220550433. The next prime is 13220550457. The reversal of 13220550451 is 15405502231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15405502231 = 7 ⋅2200786033.

It is a cyclic number.

It is not a de Polignac number, because 13220550451 - 2⁵ = 13220550419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13220550457) 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, 338346 + ... + 375391.

It is an arithmetic number, because the mean of its divisors is an integer number (3305320678).

Almost surely, 2^13220550451 is an apocalyptic number.

13220550451 is a deficient number, since it is larger than the sum of its proper divisors (732261).

13220550451 is an equidigital number, since it uses as much as digits as its factorization.

13220550451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732260.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 13220550451 in words is "thirteen billion, two hundred twenty million, five hundred fifty thousand, four hundred fifty-one".