212406226 has 4 divisors (see below), whose sum is σ = 318609342. Its totient is φ = 106203112.

The previous prime is 212406223. The next prime is 212406241. The reversal of 212406226 is 622604212.

212406226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 144360225 + 68046001 = 12015^2 + 8249^2 .

It is a super-3 number, since 3×212406226³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212406226.

It is not an unprimeable number, because it can be changed into a prime (212406221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53101555 + ... + 53101558.

Almost surely, 2^212406226 is an apocalyptic number.

212406226 is a deficient number, since it is larger than the sum of its proper divisors (106203116).

212406226 is a wasteful number, since it uses less digits than its factorization.

212406226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106203115.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 212406226 is about 14574.1629605271. The cubic root of 212406226 is about 596.6538044660.

The spelling of 212406226 in words is "two hundred twelve million, four hundred six thousand, two hundred twenty-six".