13656551 has 2 divisors, whose sum is σ = 13656552. Its totient is φ = 13656550.

The previous prime is 13656529. The next prime is 13656557. The reversal of 13656551 is 15565631.

13656551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13656551 - 2¹⁰ = 13655527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13656557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6828275 + 6828276.

It is an arithmetic number, because the mean of its divisors is an integer number (6828276).

Almost surely, 2^13656551 is an apocalyptic number.

13656551 is a deficient number, since it is larger than the sum of its proper divisors (1).

13656551 is an equidigital number, since it uses as much as digits as its factorization.

13656551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 32.

The square root of 13656551 is about 3695.4771004567. The cubic root of 13656551 is about 239.0270272826.

The spelling of 13656551 in words is "thirteen million, six hundred fifty-six thousand, five hundred fifty-one".