212246138 has 8 divisors (see below), whose sum is σ = 342859188. Its totient is φ = 97959744.

The previous prime is 212246087. The next prime is 212246141. The reversal of 212246138 is 831642212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 211906249 + 339889 = 14557^2 + 583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 212246138.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4081631 + ... + 4081682.

Almost surely, 2^212246138 is an apocalyptic number.

212246138 is a deficient number, since it is larger than the sum of its proper divisors (130613050).

212246138 is a wasteful number, since it uses less digits than its factorization.

212246138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8163328.

The product of its digits is 4608, while the sum is 29.

The square root of 212246138 is about 14568.6697402337. The cubic root of 212246138 is about 596.5038698763.

The spelling of 212246138 in words is "two hundred twelve million, two hundred forty-six thousand, one hundred thirty-eight".