212020556 has 36 divisors (see below), whose sum is σ = 411889296. Its totient is φ = 95414880.

The previous prime is 212020547. The next prime is 212020561. The reversal of 212020556 is 655020212.

It is a nialpdrome in base 11.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 47726 + ... + 51978.

Almost surely, 2^212020556 is an apocalyptic number.

It is an amenable number.

212020556 is a deficient number, since it is larger than the sum of its proper divisors (199868740).

212020556 is a wasteful number, since it uses less digits than its factorization.

212020556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4382 (or 4369 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 212020556 is about 14560.9256573887. The cubic root of 212020556 is about 596.2924671512.

Adding to 212020556 its reverse (655020212), we get a palindrome (867040768).

The spelling of 212020556 in words is "two hundred twelve million, twenty thousand, five hundred fifty-six".