212052505 has 16 divisors (see below), whose sum is σ = 294914304. Its totient is φ = 143357760.

The previous prime is 212052497. The next prime is 212052527. The reversal of 212052505 is 505250212.

It is not a de Polignac number, because 212052505 - 2³ = 212052497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 40182 + ... + 45151.

It is an arithmetic number, because the mean of its divisors is an integer number (18432144).

Almost surely, 2^212052505 is an apocalyptic number.

It is an amenable number.

212052505 is a deficient number, since it is larger than the sum of its proper divisors (82861799).

212052505 is an equidigital number, since it uses as much as digits as its factorization.

212052505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85416.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 212052505 is about 14562.0226960405. The cubic root of 212052505 is about 596.3224170636.

The spelling of 212052505 in words is "two hundred twelve million, fifty-two thousand, five hundred five".