13552345421 has 2 divisors, whose sum is σ = 13552345422. Its totient is φ = 13552345420.

The previous prime is 13552345381. The next prime is 13552345463. The reversal of 13552345421 is 12454325531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13552219396 + 126025 = 116414^2 + 355^2 .

It is a cyclic number.

It is not a de Polignac number, because 13552345421 - 2¹⁰ = 13552344397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13552345321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6776172710 + 6776172711.

It is an arithmetic number, because the mean of its divisors is an integer number (6776172711).

Almost surely, 2^13552345421 is an apocalyptic number.

It is an amenable number.

13552345421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13552345421 is an equidigital number, since it uses as much as digits as its factorization.

13552345421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 35.

The spelling of 13552345421 in words is "thirteen billion, five hundred fifty-two million, three hundred forty-five thousand, four hundred twenty-one".