13820551 has 2 divisors, whose sum is σ = 13820552. Its totient is φ = 13820550.

The previous prime is 13820531. The next prime is 13820561. The reversal of 13820551 is 15502831.

It is a happy number.

13820551 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 13820551 - 2¹¹ = 13818503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13820531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6910275 + 6910276.

It is an arithmetic number, because the mean of its divisors is an integer number (6910276).

Almost surely, 2^13820551 is an apocalyptic number.

13820551 is a deficient number, since it is larger than the sum of its proper divisors (1).

13820551 is an equidigital number, since it uses as much as digits as its factorization.

13820551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 13820551 is about 3717.6001667743. The cubic root of 13820551 is about 239.9800388491.

The spelling of 13820551 in words is "thirteen million, eight hundred twenty thousand, five hundred fifty-one".