13744734221 has 4 divisors (see below), whose sum is σ = 13745024700. Its totient is φ = 13744443744.

The previous prime is 13744734217. The next prime is 13744734233. The reversal of 13744734221 is 12243744731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12243744731 = 4219 ⋅2902049.

It can be written as a sum of positive squares in 2 ways, for example, as 2748904900 + 10995829321 = 52430^2 + 104861^2 .

It is a cyclic number.

It is not a de Polignac number, because 13744734221 - 2² = 13744734217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13744734281) 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, 55976 + ... + 174993.

It is an arithmetic number, because the mean of its divisors is an integer number (3436256175).

Almost surely, 2^13744734221 is an apocalyptic number.

It is an amenable number.

13744734221 is a deficient number, since it is larger than the sum of its proper divisors (290479).

13744734221 is an equidigital number, since it uses as much as digits as its factorization.

13744734221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290478.

The product of its digits is 112896, while the sum is 38.

The spelling of 13744734221 in words is "thirteen billion, seven hundred forty-four million, seven hundred thirty-four thousand, two hundred twenty-one".