13551449 has 2 divisors, whose sum is σ = 13551450. Its totient is φ = 13551448.

The previous prime is 13551437. The next prime is 13551451. The reversal of 13551449 is 94415531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11102224 + 2449225 = 3332^2 + 1565^2 .

It is a cyclic number.

It is not a de Polignac number, because 13551449 - 2¹² = 13547353 is a prime.

It is a Sophie Germain prime.

Together with 13551451, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13551409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6775724 + 6775725.

It is an arithmetic number, because the mean of its divisors is an integer number (6775725).

Almost surely, 2^13551449 is an apocalyptic number.

It is an amenable number.

13551449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13551449 is an equidigital number, since it uses as much as digits as its factorization.

13551449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 13551449 is about 3681.2292783797. The cubic root of 13551449 is about 238.4122565598.

The spelling of 13551449 in words is "thirteen million, five hundred fifty-one thousand, four hundred forty-nine".