212303215 has 4 divisors (see below), whose sum is σ = 254763864. Its totient is φ = 169842568.

The previous prime is 212303209. The next prime is 212303219. The reversal of 212303215 is 512303212.

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 212303215 - 2⁹ = 212302703 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212303192 and 212303201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212303219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21230317 + ... + 21230326.

It is an arithmetic number, because the mean of its divisors is an integer number (63690966).

Almost surely, 2^212303215 is an apocalyptic number.

212303215 is a deficient number, since it is larger than the sum of its proper divisors (42460649).

212303215 is an equidigital number, since it uses as much as digits as its factorization.

212303215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42460648.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 212303215 is about 14570.6285039459. The cubic root of 212303215 is about 596.5573354741.

Adding to 212303215 its reverse (512303212), we get a palindrome (724606427).

The spelling of 212303215 in words is "two hundred twelve million, three hundred three thousand, two hundred fifteen".