13228157 has 2 divisors, whose sum is σ = 13228158. Its totient is φ = 13228156.

The previous prime is 13228153. The next prime is 13228169. The reversal of 13228157 is 75182231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13205956 + 22201 = 3634^2 + 149^2 .

It is a cyclic number.

It is not a de Polignac number, because 13228157 - 2² = 13228153 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13228153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6614078 + 6614079.

It is an arithmetic number, because the mean of its divisors is an integer number (6614079).

Almost surely, 2^13228157 is an apocalyptic number.

It is an amenable number.

13228157 is a deficient number, since it is larger than the sum of its proper divisors (1).

13228157 is an equidigital number, since it uses as much as digits as its factorization.

13228157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 29.

The square root of 13228157 is about 3637.0533402742. The cubic root of 13228157 is about 236.5010719766.

The spelling of 13228157 in words is "thirteen million, two hundred twenty-eight thousand, one hundred fifty-seven".