13263226521 has 16 divisors (see below), whose sum is σ = 18060857280. Its totient is φ = 8654667840.

The previous prime is 13263226519. The next prime is 13263226541. The reversal of 13263226521 is 12562236231.

It is a happy number.

It is not a de Polignac number, because 13263226521 - 2¹ = 13263226519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13263226541) 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, 32131 + ... + 166008.

It is an arithmetic number, because the mean of its divisors is an integer number (1128803580).

Almost surely, 2^13263226521 is an apocalyptic number.

It is an amenable number.

13263226521 is a deficient number, since it is larger than the sum of its proper divisors (4797630759).

13263226521 is a wasteful number, since it uses less digits than its factorization.

13263226521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198616.

The product of its digits is 25920, while the sum is 33.

The spelling of 13263226521 in words is "thirteen billion, two hundred sixty-three million, two hundred twenty-six thousand, five hundred twenty-one".