212738827 has 4 divisors (see below), whose sum is σ = 243130096. Its totient is φ = 182347560.

The previous prime is 212738807. The next prime is 212738831. The reversal of 212738827 is 728837212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212738827 - 2⁷ = 212738699 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212738827.

It is not an unprimeable number, because it can be changed into a prime (212738807) 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 3 ways as a sum of consecutive naturals, for example, 15195624 + ... + 15195637.

It is an arithmetic number, because the mean of its divisors is an integer number (60782524).

Almost surely, 2^212738827 is an apocalyptic number.

212738827 is a deficient number, since it is larger than the sum of its proper divisors (30391269).

212738827 is an equidigital number, since it uses as much as digits as its factorization.

212738827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30391268.

The product of its digits is 75264, while the sum is 40.

The square root of 212738827 is about 14585.5691352789. The cubic root of 212738827 is about 596.9650699195.

The spelling of 212738827 in words is "two hundred twelve million, seven hundred thirty-eight thousand, eight hundred twenty-seven".