212643834 has 32 divisors (see below), whose sum is σ = 473800320. Its totient is φ = 63172032.

The previous prime is 212643833. The next prime is 212643859. The reversal of 212643834 is 438346212.

It is a junction number, because it is equal to n+sod(n) for n = 212643795 and 212643804.

It is not an unprimeable number, because it can be changed into a prime (212643833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44742 + ... + 49265.

It is an arithmetic number, because the mean of its divisors is an integer number (14806260).

Almost surely, 2^212643834 is an apocalyptic number.

212643834 is an abundant number, since it is smaller than the sum of its proper divisors (261156486).

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

212643834 is a wasteful number, since it uses less digits than its factorization.

212643834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94054.

The product of its digits is 27648, while the sum is 33.

The square root of 212643834 is about 14582.3123680711. The cubic root of 212643834 is about 596.8762036068.

The spelling of 212643834 in words is "two hundred twelve million, six hundred forty-three thousand, eight hundred thirty-four".