212052506 has 8 divisors (see below), whose sum is σ = 318200724. Its totient is φ = 105985600.

The previous prime is 212052497. The next prime is 212052527. The reversal of 212052506 is 605250212.

It can be written as a sum of positive squares in 2 ways, for example, as 186459025 + 25593481 = 13655^2 + 5059^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 13325 + ... + 24528.

Almost surely, 2^212052506 is an apocalyptic number.

212052506 is a deficient number, since it is larger than the sum of its proper divisors (106148218).

212052506 is a wasteful number, since it uses less digits than its factorization.

212052506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40656.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 212052506 is about 14562.0227303764. The cubic root of 212052506 is about 596.3224180009.

The spelling of 212052506 in words is "two hundred twelve million, fifty-two thousand, five hundred six".