312036521 has 2 divisors, whose sum is σ = 312036522. Its totient is φ = 312036520.

The previous prime is 312036511. The next prime is 312036523. The reversal of 312036521 is 125630213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 247716121 + 64320400 = 15739^2 + 8020^2 .

It is a cyclic number.

It is not a de Polignac number, because 312036521 - 2⁶ = 312036457 is a prime.

Together with 312036523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (312036523) 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, 156018260 + 156018261.

It is an arithmetic number, because the mean of its divisors is an integer number (156018261).

Almost surely, 2^312036521 is an apocalyptic number.

It is an amenable number.

312036521 is a deficient number, since it is larger than the sum of its proper divisors (1).

312036521 is an equidigital number, since it uses as much as digits as its factorization.

312036521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 312036521 is about 17664.5554996439. Note that the first 3 decimals coincide. The cubic root of 312036521 is about 678.2687513381.

Adding to 312036521 its reverse (125630213), we get a palindrome (437666734).

The spelling of 312036521 in words is "three hundred twelve million, thirty-six thousand, five hundred twenty-one".