212423109 has 16 divisors (see below), whose sum is σ = 300484800. Its totient is φ = 133021440.

The previous prime is 212423089. The next prime is 212423117. The reversal of 212423109 is 901324212.

It is not a de Polignac number, because 212423109 - 2⁷ = 212422981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212423119) by changing a digit.

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, 23742 + ... + 31440.

It is an arithmetic number, because the mean of its divisors is an integer number (18780300).

Almost surely, 2^212423109 is an apocalyptic number.

It is an amenable number.

212423109 is a deficient number, since it is larger than the sum of its proper divisors (88061691).

212423109 is a wasteful number, since it uses less digits than its factorization.

212423109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8260.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 212423109 is about 14574.7421589543. The cubic root of 212423109 is about 596.6696122878.

The spelling of 212423109 in words is "two hundred twelve million, four hundred twenty-three thousand, one hundred nine".