212382385 has 4 divisors (see below), whose sum is σ = 254858868. Its totient is φ = 169905904.

The previous prime is 212382383. The next prime is 212382389. The reversal of 212382385 is 583283212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 153660816 + 58721569 = 12396^2 + 7663^2 .

It is a cyclic number.

It is not a de Polignac number, because 212382385 - 2¹ = 212382383 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 212382385.

It is not an unprimeable number, because it can be changed into a prime (212382383) 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, 21238234 + ... + 21238243.

It is an arithmetic number, because the mean of its divisors is an integer number (63714717).

Almost surely, 2^212382385 is an apocalyptic number.

It is an amenable number.

212382385 is a deficient number, since it is larger than the sum of its proper divisors (42476483).

212382385 is an equidigital number, since it uses as much as digits as its factorization.

212382385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42476482.

The product of its digits is 23040, while the sum is 34.

The square root of 212382385 is about 14573.3450175312. The cubic root of 212382385 is about 596.6314803313.

The spelling of 212382385 in words is "two hundred twelve million, three hundred eighty-two thousand, three hundred eighty-five".