13226017531 has 4 divisors (see below), whose sum is σ = 13228203592. Its totient is φ = 13223831472.

The previous prime is 13226017523. The next prime is 13226017573. The reversal of 13226017531 is 13571062231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13226017531 - 2³ = 13226017523 is a prime.

It is a super-2 number, since 2×13226017531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13226017493 and 13226017502.

It is not an unprimeable number, because it can be changed into a prime (13226017031) 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, 1083930 + ... + 1096063.

It is an arithmetic number, because the mean of its divisors is an integer number (3307050898).

Almost surely, 2^13226017531 is an apocalyptic number.

13226017531 is a deficient number, since it is larger than the sum of its proper divisors (2186061).

13226017531 is an equidigital number, since it uses as much as digits as its factorization.

13226017531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186060.

The product of its (nonzero) digits is 7560, while the sum is 31.

Adding to 13226017531 its reverse (13571062231), we get a palindrome (26797079762).

The spelling of 13226017531 in words is "thirteen billion, two hundred twenty-six million, seventeen thousand, five hundred thirty-one".