13511220441 has 16 divisors (see below), whose sum is σ = 19903999104. Its totient is φ = 8109035264.

The previous prime is 13511220433. The next prime is 13511220479. The reversal of 13511220441 is 14402211531.

It is a cyclic number.

It is not a de Polignac number, because 13511220441 - 2³ = 13511220433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13511220421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5758086 + ... + 5760431.

It is an arithmetic number, because the mean of its divisors is an integer number (1243999944).

Almost surely, 2^13511220441 is an apocalyptic number.

It is an amenable number.

13511220441 is a deficient number, since it is larger than the sum of its proper divisors (6392778663).

13511220441 is a wasteful number, since it uses less digits than its factorization.

13511220441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11518560.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 13511220441 its reverse (14402211531), we get a palindrome (27913431972).

The spelling of 13511220441 in words is "thirteen billion, five hundred eleven million, two hundred twenty thousand, four hundred forty-one".