212944825 has 12 divisors (see below), whose sum is σ = 273157740. Its totient is φ = 164480960.

The previous prime is 212944819. The next prime is 212944847. The reversal of 212944825 is 528449212.

It can be written as a sum of positive squares in 6 ways, for example, as 42146064 + 170798761 = 6492^2 + 13069^2 .

It is not a de Polignac number, because 212944825 - 2⁹ = 212944313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146134 + ... + 147583.

It is an arithmetic number, because the mean of its divisors is an integer number (22763145).

Almost surely, 2^212944825 is an apocalyptic number.

212944825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212944825 is a deficient number, since it is larger than the sum of its proper divisors (60212915).

212944825 is a wasteful number, since it uses less digits than its factorization.

212944825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293756 (or 293751 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 212944825 is about 14592.6291325450. The cubic root of 212944825 is about 597.1576909864.

The spelling of 212944825 in words is "two hundred twelve million, nine hundred forty-four thousand, eight hundred twenty-five".