13401432521 has 8 divisors (see below), whose sum is σ = 13466948544. Its totient is φ = 13336071760.

The previous prime is 13401432509. The next prime is 13401432593. The reversal of 13401432521 is 12523410431.

It is a happy number.

13401432521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13401432521 - 2¹⁰ = 13401431497 is a prime.

It is a super-2 number, since 2×13401432521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13401422521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136151 + ... + 212931.

It is an arithmetic number, because the mean of its divisors is an integer number (1683368568).

Almost surely, 2^13401432521 is an apocalyptic number.

It is an amenable number.

13401432521 is a deficient number, since it is larger than the sum of its proper divisors (65516023).

13401432521 is an equidigital number, since it uses as much as digits as its factorization.

13401432521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77631.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 13401432521 its reverse (12523410431), we get a palindrome (25924842952).

The spelling of 13401432521 in words is "thirteen billion, four hundred one million, four hundred thirty-two thousand, five hundred twenty-one".