212213894 has 4 divisors (see below), whose sum is σ = 318320844. Its totient is φ = 106106946.

The previous prime is 212213861. The next prime is 212213929. The reversal of 212213894 is 498312212.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 212213894.

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, 53053472 + ... + 53053475.

It is an arithmetic number, because the mean of its divisors is an integer number (79580211).

Almost surely, 2^212213894 is an apocalyptic number.

212213894 is a deficient number, since it is larger than the sum of its proper divisors (106106950).

212213894 is a wasteful number, since it uses less digits than its factorization.

212213894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106106949.

The product of its digits is 6912, while the sum is 32.

The square root of 212213894 is about 14567.5630769185. The cubic root of 212213894 is about 596.4736617965.

The spelling of 212213894 in words is "two hundred twelve million, two hundred thirteen thousand, eight hundred ninety-four".