13220351 has 2 divisors, whose sum is σ = 13220352. Its totient is φ = 13220350.

The previous prime is 13220329. The next prime is 13220357. The reversal of 13220351 is 15302231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13220351 - 2⁶ = 13220287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13220357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610175 + 6610176.

It is an arithmetic number, because the mean of its divisors is an integer number (6610176).

Almost surely, 2^13220351 is an apocalyptic number.

13220351 is a deficient number, since it is larger than the sum of its proper divisors (1).

13220351 is an equidigital number, since it uses as much as digits as its factorization.

13220351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 13220351 is about 3635.9800604514. The cubic root of 13220351 is about 236.4545426774.

Adding to 13220351 its reverse (15302231), we get a palindrome (28522582).

The spelling of 13220351 in words is "thirteen million, two hundred twenty thousand, three hundred fifty-one".