13400551 has 2 divisors, whose sum is σ = 13400552. Its totient is φ = 13400550.

The previous prime is 13400509. The next prime is 13400561. The reversal of 13400551 is 15500431.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13400551 - 2¹¹ = 13398503 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13400501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6700275 + 6700276.

It is an arithmetic number, because the mean of its divisors is an integer number (6700276).

Almost surely, 2^13400551 is an apocalyptic number.

13400551 is a deficient number, since it is larger than the sum of its proper divisors (1).

13400551 is an equidigital number, since it uses as much as digits as its factorization.

13400551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 13400551 is about 3660.6763036357. The cubic root of 13400551 is about 237.5240293323.

Adding to 13400551 its reverse (15500431), we get a palindrome (28900982).

The spelling of 13400551 in words is "thirteen million, four hundred thousand, five hundred fifty-one".