312522403 has 2 divisors, whose sum is σ = 312522404. Its totient is φ = 312522402.

The previous prime is 312522389. The next prime is 312522421. The reversal of 312522403 is 304225213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312522403 is a prime.

It is a super-3 number, since 3×312522403³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (312522493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156261201 + 156261202.

It is an arithmetic number, because the mean of its divisors is an integer number (156261202).

Almost surely, 2^312522403 is an apocalyptic number.

312522403 is a deficient number, since it is larger than the sum of its proper divisors (1).

312522403 is an equidigital number, since it uses as much as digits as its factorization.

312522403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 312522403 is about 17678.3031708363. The cubic root of 312522403 is about 678.6206200540.

Adding to 312522403 its reverse (304225213), we get a palindrome (616747616).

The spelling of 312522403 in words is "three hundred twelve million, five hundred twenty-two thousand, four hundred three".