212319905 has 16 divisors (see below), whose sum is σ = 294188160. Its totient is φ = 144087552.

The previous prime is 212319883. The next prime is 212319911. The reversal of 212319905 is 509913212.

It is not a de Polignac number, because 212319905 - 2⁶ = 212319841 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, 27875 + ... + 34664.

It is an arithmetic number, because the mean of its divisors is an integer number (18386760).

Almost surely, 2^212319905 is an apocalyptic number.

It is an amenable number.

212319905 is a deficient number, since it is larger than the sum of its proper divisors (81868255).

212319905 is an equidigital number, since it uses as much as digits as its factorization.

212319905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62648.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 212319905 is about 14571.2012202152. The cubic root of 212319905 is about 596.5729676459.

The spelling of 212319905 in words is "two hundred twelve million, three hundred nineteen thousand, nine hundred five".