13401631321 has 8 divisors (see below), whose sum is σ = 14515953480. Its totient is φ = 12299227392.

The previous prime is 13401631307. The next prime is 13401631333. The reversal of 13401631321 is 12313610431.

It can be written as a sum of positive squares in 4 ways, for example, as 6899628096 + 6502003225 = 83064^2 + 80635^2 .

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 13401631321 - 2⁷ = 13401631193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13401635321) 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, 2977216 + ... + 2981713.

It is an arithmetic number, because the mean of its divisors is an integer number (1814494185).

Almost surely, 2^13401631321 is an apocalyptic number.

It is an amenable number.

13401631321 is a deficient number, since it is larger than the sum of its proper divisors (1114322159).

13401631321 is a wasteful number, since it uses less digits than its factorization.

13401631321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5959115.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 13401631321 in words is "thirteen billion, four hundred one million, six hundred thirty-one thousand, three hundred twenty-one".