312403211 has 2 divisors, whose sum is σ = 312403212. Its totient is φ = 312403210.

The previous prime is 312403207. The next prime is 312403241. The reversal of 312403211 is 112304213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312403211 - 2² = 312403207 is a prime.

It is a super-2 number, since 2×312403211² = 195191532486221042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312403211.

It is not a weakly prime, because it can be changed into another prime (312403241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156201605 + 156201606.

It is an arithmetic number, because the mean of its divisors is an integer number (156201606).

Almost surely, 2^312403211 is an apocalyptic number.

312403211 is a deficient number, since it is larger than the sum of its proper divisors (1).

312403211 is an equidigital number, since it uses as much as digits as its factorization.

312403211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 312403211 is about 17674.9317113249. The cubic root of 312403211 is about 678.5343367099.

Adding to 312403211 its reverse (112304213), we get a palindrome (424707424).

The spelling of 312403211 in words is "three hundred twelve million, four hundred three thousand, two hundred eleven".