13531272401 has 4 divisors (see below), whose sum is σ = 13531522404. Its totient is φ = 13531022400.

The previous prime is 13531272373. The next prime is 13531272409. The reversal of 13531272401 is 10427213531.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10412161600 + 3119110801 = 102040^2 + 55849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13531272401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13531272409) 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, 6140 + ... + 164621.

It is an arithmetic number, because the mean of its divisors is an integer number (3382880601).

Almost surely, 2^13531272401 is an apocalyptic number.

It is an amenable number.

13531272401 is a deficient number, since it is larger than the sum of its proper divisors (250003).

13531272401 is an equidigital number, since it uses as much as digits as its factorization.

13531272401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250002.

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 13531272401 its reverse (10427213531), we get a palindrome (23958485932).

The spelling of 13531272401 in words is "thirteen billion, five hundred thirty-one million, two hundred seventy-two thousand, four hundred one".