212215469 has 4 divisors (see below), whose sum is σ = 214093596. Its totient is φ = 210337344.

The previous prime is 212215463. The next prime is 212215477. The reversal of 212215469 is 964512212.

212215469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 71199844 + 141015625 = 8438^2 + 11875^2 .

It is a cyclic number.

It is not a de Polignac number, because 212215469 - 2²⁴ = 195438253 is a prime.

It is a super-2 number, since 2×212215469² = 90070810565779922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212215463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 938894 + ... + 939119.

It is an arithmetic number, because the mean of its divisors is an integer number (53523399).

Almost surely, 2^212215469 is an apocalyptic number.

It is an amenable number.

212215469 is a deficient number, since it is larger than the sum of its proper divisors (1878127).

212215469 is a wasteful number, since it uses less digits than its factorization.

212215469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878126.

The product of its digits is 8640, while the sum is 32.

The square root of 212215469 is about 14567.6171352764. The cubic root of 212215469 is about 596.4751374204.

The spelling of 212215469 in words is "two hundred twelve million, two hundred fifteen thousand, four hundred sixty-nine".