312213203 has 2 divisors, whose sum is σ = 312213204. Its totient is φ = 312213202.

The previous prime is 312213173. The next prime is 312213227. The reversal of 312213203 is 302312213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312213203 - 2⁸ = 312212947 is a prime.

It is not a weakly prime, because it can be changed into another prime (312213403) 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 as a sum of consecutive naturals, namely, 156106601 + 156106602.

It is an arithmetic number, because the mean of its divisors is an integer number (156106602).

Almost surely, 2^312213203 is an apocalyptic number.

312213203 is a deficient number, since it is larger than the sum of its proper divisors (1).

312213203 is an equidigital number, since it uses as much as digits as its factorization.

312213203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 312213203 is about 17669.5558235061. Note that the first 3 decimals coincide. The cubic root of 312213203 is about 678.3967441213.

Adding to 312213203 its reverse (302312213), we get a palindrome (614525416).

The spelling of 312213203 in words is "three hundred twelve million, two hundred thirteen thousand, two hundred three".