212423105 has 16 divisors (see below), whose sum is σ = 262309440. Its totient is φ = 165022272.

The previous prime is 212423089. The next prime is 212423117. The reversal of 212423105 is 501324212.

It is a cyclic number.

It is not a de Polignac number, because 212423105 - 2⁴ = 212423089 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144866 + ... + 146324.

It is an arithmetic number, because the mean of its divisors is an integer number (16394340).

Almost surely, 2^212423105 is an apocalyptic number.

It is an amenable number.

212423105 is a deficient number, since it is larger than the sum of its proper divisors (49886335).

212423105 is a wasteful number, since it uses less digits than its factorization.

212423105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 212423105 is about 14574.7420217306. The cubic root of 212423105 is about 596.6696085426.

Adding to 212423105 its reverse (501324212), we get a palindrome (713747317).

The spelling of 212423105 in words is "two hundred twelve million, four hundred twenty-three thousand, one hundred five".