13667551 has 2 divisors, whose sum is σ = 13667552. Its totient is φ = 13667550.

The previous prime is 13667539. The next prime is 13667557. The reversal of 13667551 is 15576631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13667551 - 2⁹ = 13667039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13667557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6833775 + 6833776.

It is an arithmetic number, because the mean of its divisors is an integer number (6833776).

Almost surely, 2^13667551 is an apocalyptic number.

13667551 is a deficient number, since it is larger than the sum of its proper divisors (1).

13667551 is an equidigital number, since it uses as much as digits as its factorization.

13667551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 34.

The square root of 13667551 is about 3696.9651066787. The cubic root of 13667551 is about 239.0911867636.

The spelling of 13667551 in words is "thirteen million, six hundred sixty-seven thousand, five hundred fifty-one".