312322081 has 2 divisors, whose sum is σ = 312322082. Its totient is φ = 312322080.

The previous prime is 312322009. The next prime is 312322091. The reversal of 312322081 is 180223213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 269485056 + 42837025 = 16416^2 + 6545^2 .

It is a cyclic number.

It is not a de Polignac number, because 312322081 - 2¹¹ = 312320033 is a prime.

It is a super-2 number, since 2×312322081² = 195090164560341122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312322091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156161040 + 156161041.

It is an arithmetic number, because the mean of its divisors is an integer number (156161041).

Almost surely, 2^312322081 is an apocalyptic number.

It is an amenable number.

312322081 is a deficient number, since it is larger than the sum of its proper divisors (1).

312322081 is an equidigital number, since it uses as much as digits as its factorization.

312322081 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 22.

The square root of 312322081 is about 17672.6365039289. The cubic root of 312322081 is about 678.4755939752.

Adding to 312322081 its reverse (180223213), we get a palindrome (492545294).

The spelling of 312322081 in words is "three hundred twelve million, three hundred twenty-two thousand, eighty-one".