212323215 has 32 divisors (see below), whose sum is σ = 374786496. Its totient is φ = 101975040.

The previous prime is 212323211. The next prime is 212323219. The reversal of 212323215 is 512323212.

It is an interprime number because it is at equal distance from previous prime (212323211) and next prime (212323219).

It is not a de Polignac number, because 212323215 - 2² = 212323211 is a prime.

It is a super-2 number, since 2×212323215² = 90162295255872450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212323191 and 212323200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212323211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5284 + ... + 21273.

It is an arithmetic number, because the mean of its divisors is an integer number (11712078).

Almost surely, 2^212323215 is an apocalyptic number.

212323215 is a deficient number, since it is larger than the sum of its proper divisors (162463281).

212323215 is a wasteful number, since it uses less digits than its factorization.

212323215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26619.

The product of its digits is 720, while the sum is 21.

The square root of 212323215 is about 14571.3147999760. The cubic root of 212323215 is about 596.5760677576.

Adding to 212323215 its reverse (512323212), we get a palindrome (724646427).

The spelling of 212323215 in words is "two hundred twelve million, three hundred twenty-three thousand, two hundred fifteen".