13431025543321 has 8 divisors (see below), whose sum is σ = 13523338269000. Its totient is φ = 13338741772800.

The previous prime is 13431025543289. The next prime is 13431025543333. The reversal of 13431025543321 is 12334552013431.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 173525566096 + 13257499977225 = 416564^2 + 3641085^2 .

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 13431025543321 - 2⁵ = 13431025543289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13431025543121) 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, 6307480 + ... + 8163721.

It is an arithmetic number, because the mean of its divisors is an integer number (1690417283625).

Almost surely, 2^{13431025543321} is an apocalyptic number.

It is an amenable number.

13431025543321 is a deficient number, since it is larger than the sum of its proper divisors (92312725679).

13431025543321 is a wasteful number, since it uses less digits than its factorization.

13431025543321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14477579.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 13431025543321 its reverse (12334552013431), we get a palindrome (25765577556752).

The spelling of 13431025543321 in words is "thirteen trillion, four hundred thirty-one billion, twenty-five million, five hundred forty-three thousand, three hundred twenty-one".