212539956 has 48 divisors (see below), whose sum is σ = 518192640. Its totient is φ = 67715200.

The previous prime is 212539931. The next prime is 212539993. The reversal of 212539956 is 659935212.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 32125 + ... + 38171.

It is an arithmetic number, because the mean of its divisors is an integer number (10795680).

Almost surely, 2^212539956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212539956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259096320).

212539956 is an abundant number, since it is smaller than the sum of its proper divisors (305652684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212539956 is a wasteful number, since it uses less digits than its factorization.

212539956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6184 (or 6182 counting only the distinct ones).

The product of its digits is 145800, while the sum is 42.

The square root of 212539956 is about 14578.7501521907. The cubic root of 212539956 is about 596.7789950428.

The spelling of 212539956 in words is "two hundred twelve million, five hundred thirty-nine thousand, nine hundred fifty-six".