13303561 has 2 divisors, whose sum is σ = 13303562. Its totient is φ = 13303560.

The previous prime is 13303541. The next prime is 13303567. The reversal of 13303561 is 16530331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7733961 + 5569600 = 2781^2 + 2360^2 .

It is a cyclic number.

It is not a de Polignac number, because 13303561 - 2⁵ = 13303529 is a prime.

It is not a weakly prime, because it can be changed into another prime (13303567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6651780 + 6651781.

It is an arithmetic number, because the mean of its divisors is an integer number (6651781).

Almost surely, 2^13303561 is an apocalyptic number.

It is an amenable number.

13303561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13303561 is an equidigital number, since it uses as much as digits as its factorization.

13303561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 22.

The square root of 13303561 is about 3647.4046937514. The cubic root of 13303561 is about 236.9495937476.

Adding to 13303561 its reverse (16530331), we get a palindrome (29833892).

The spelling of 13303561 in words is "thirteen million, three hundred three thousand, five hundred sixty-one".