169212226 has 4 divisors (see below), whose sum is σ = 253818342. Its totient is φ = 84606112.

The previous prime is 169212223. The next prime is 169212227. The reversal of 169212226 is 622212961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 622212961 = 281 ⋅2214281.

It can be written as a sum of positive squares in only one way, i.e., 90269001 + 78943225 = 9501^2 + 8885^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (169212221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42303055 + ... + 42303058.

Almost surely, 2^169212226 is an apocalyptic number.

169212226 is a deficient number, since it is larger than the sum of its proper divisors (84606116).

169212226 is an equidigital number, since it uses as much as digits as its factorization.

169212226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84606115.

The product of its digits is 5184, while the sum is 31.

The square root of 169212226 is about 13008.1599774911. The cubic root of 169212226 is about 553.1088144944.

The spelling of 169212226 in words is "one hundred sixty-nine million, two hundred twelve thousand, two hundred twenty-six".