212086905 has 8 divisors (see below), whose sum is σ = 339339072. Its totient is φ = 113113008.

The previous prime is 212086877. The next prime is 212086909. The reversal of 212086905 is 509680212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212086905 - 2¹² = 212082809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212086909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7069549 + ... + 7069578.

It is an arithmetic number, because the mean of its divisors is an integer number (42417384).

Almost surely, 2^212086905 is an apocalyptic number.

It is an amenable number.

212086905 is a deficient number, since it is larger than the sum of its proper divisors (127252167).

212086905 is a wasteful number, since it uses less digits than its factorization.

212086905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14139135.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 212086905 is about 14563.2038027352. The cubic root of 212086905 is about 596.3546612507.

The spelling of 212086905 in words is "two hundred twelve million, eighty-six thousand, nine hundred five".