13220401 has 2 divisors, whose sum is σ = 13220402. Its totient is φ = 13220400.

The previous prime is 13220387. The next prime is 13220411. The reversal of 13220401 is 10402231.

13220401 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 can be written as a sum of positive squares in only one way, i.e., 13133376 + 87025 = 3624^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 13220401 - 2⁵ = 13220369 is a prime.

It is not a weakly prime, because it can be changed into another prime (13220411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610200 + 6610201.

It is an arithmetic number, because the mean of its divisors is an integer number (6610201).

Almost surely, 2^13220401 is an apocalyptic number.

It is an amenable number.

13220401 is a deficient number, since it is larger than the sum of its proper divisors (1).

13220401 is an equidigital number, since it uses as much as digits as its factorization.

13220401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 13220401 is about 3635.9869361702. The cubic root of 13220401 is about 236.4548407712.

Adding to 13220401 its reverse (10402231), we get a palindrome (23622632).

The spelling of 13220401 in words is "thirteen million, two hundred twenty thousand, four hundred one".