13172213 has 2 divisors, whose sum is σ = 13172214. Its totient is φ = 13172212.

The previous prime is 13172209. The next prime is 13172219. The reversal of 13172213 is 31227131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12264004 + 908209 = 3502^2 + 953^2 .

It is a cyclic number.

It is not a de Polignac number, because 13172213 - 2² = 13172209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13172219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6586106 + 6586107.

It is an arithmetic number, because the mean of its divisors is an integer number (6586107).

Almost surely, 2^13172213 is an apocalyptic number.

It is an amenable number.

13172213 is a deficient number, since it is larger than the sum of its proper divisors (1).

13172213 is an equidigital number, since it uses as much as digits as its factorization.

13172213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 20.

The square root of 13172213 is about 3629.3543502943. The cubic root of 13172213 is about 236.1672005318.

Adding to 13172213 its reverse (31227131), we get a palindrome (44399344).

The spelling of 13172213 in words is "thirteen million, one hundred seventy-two thousand, two hundred thirteen".