13391551 has 2 divisors, whose sum is σ = 13391552. Its totient is φ = 13391550.

The previous prime is 13391549. The next prime is 13391621. The reversal of 13391551 is 15519331.

13391551 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13391551 - 2¹ = 13391549 is a prime.

Together with 13391549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13391501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6695775 + 6695776.

It is an arithmetic number, because the mean of its divisors is an integer number (6695776).

Almost surely, 2^13391551 is an apocalyptic number.

13391551 is a deficient number, since it is larger than the sum of its proper divisors (1).

13391551 is an equidigital number, since it uses as much as digits as its factorization.

13391551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2025, while the sum is 28.

The square root of 13391551 is about 3659.4468161185. The cubic root of 13391551 is about 237.4708425886.

The spelling of 13391551 in words is "thirteen million, three hundred ninety-one thousand, five hundred fifty-one".