13215229 has 2 divisors, whose sum is σ = 13215230. Its totient is φ = 13215228.

The previous prime is 13215221. The next prime is 13215247. The reversal of 13215229 is 92251231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12766329 + 448900 = 3573^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 13215229 - 2³ = 13215221 is a prime.

It is equal to p₈₆₂₃₃₃ and since 13215229 and 862333 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13215221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6607614 + 6607615.

It is an arithmetic number, because the mean of its divisors is an integer number (6607615).

Almost surely, 2^13215229 is an apocalyptic number.

It is an amenable number.

13215229 is a deficient number, since it is larger than the sum of its proper divisors (1).

13215229 is an equidigital number, since it uses as much as digits as its factorization.

13215229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 13215229 is about 3635.2756429190. The cubic root of 13215229 is about 236.4240019701.

The spelling of 13215229 in words is "thirteen million, two hundred fifteen thousand, two hundred twenty-nine".