312243401 has 2 divisors, whose sum is σ = 312243402. Its totient is φ = 312243400.

The previous prime is 312243391. The next prime is 312243457. The reversal of 312243401 is 104342213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171583801 + 140659600 = 13099^2 + 11860^2 .

It is a cyclic number.

It is not a de Polignac number, because 312243401 - 2²⁶ = 245134537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (312243461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156121700 + 156121701.

It is an arithmetic number, because the mean of its divisors is an integer number (156121701).

Almost surely, 2^312243401 is an apocalyptic number.

It is an amenable number.

312243401 is a deficient number, since it is larger than the sum of its proper divisors (1).

312243401 is an equidigital number, since it uses as much as digits as its factorization.

312243401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 312243401 is about 17670.4103234758. The cubic root of 312243401 is about 678.4186154624.

Adding to 312243401 its reverse (104342213), we get a palindrome (416585614).

The spelling of 312243401 in words is "three hundred twelve million, two hundred forty-three thousand, four hundred one".