13526221431 has 8 divisors (see below), whose sum is σ = 18288975744. Its totient is φ = 8890474040.

The previous prime is 13526221421. The next prime is 13526221439. The reversal of 13526221431 is 13412262531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13526221431 - 2¹⁴ = 13526205047 is a prime.

It is a super-2 number, since 2×13526221431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13526221439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31751481 + ... + 31751906.

It is an arithmetic number, because the mean of its divisors is an integer number (2286121968).

Almost surely, 2^13526221431 is an apocalyptic number.

13526221431 is a deficient number, since it is larger than the sum of its proper divisors (4762754313).

13526221431 is an equidigital number, since it uses as much as digits as its factorization.

13526221431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63503461.

The product of its digits is 8640, while the sum is 30.

Adding to 13526221431 its reverse (13412262531), we get a palindrome (26938483962).

The spelling of 13526221431 in words is "thirteen billion, five hundred twenty-six million, two hundred twenty-one thousand, four hundred thirty-one".