209229413812 has 6 divisors (see below), whose sum is σ = 366151474178. Its totient is φ = 104614706904.

The previous prime is 209229413797. The next prime is 209229413839. The reversal of 209229413812 is 218314922902.

It can be written as a sum of positive squares in only one way, i.e., 164117352996 + 45112060816 = 405114^2 + 212396^2 .

It is a super-2 number, since 2×209229413812² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26153676723 + ... + 26153676730.

Almost surely, 2^209229413812 is an apocalyptic number.

It is an amenable number.

209229413812 is a deficient number, since it is larger than the sum of its proper divisors (156922060366).

209229413812 is a wasteful number, since it uses less digits than its factorization.

209229413812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52307353457 (or 52307353455 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 209229413812 in words is "two hundred nine billion, two hundred twenty-nine million, four hundred thirteen thousand, eight hundred twelve".