312223785 has 64 divisors (see below), whose sum is σ = 552075264. Its totient is φ = 149990400.

The previous prime is 312223777. The next prime is 312223787. The reversal of 312223785 is 587322213.

It is not a de Polignac number, because 312223785 - 2³ = 312223777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312223787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1003780 + ... + 1004090.

It is an arithmetic number, because the mean of its divisors is an integer number (8626176).

Almost surely, 2^312223785 is an apocalyptic number.

It is an amenable number.

312223785 is a deficient number, since it is larger than the sum of its proper divisors (239851479).

312223785 is a wasteful number, since it uses less digits than its factorization.

312223785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494.

The product of its digits is 20160, while the sum is 33.

The square root of 312223785 is about 17669.8552625651. The cubic root of 312223785 is about 678.4044084494.

Adding to 312223785 its reverse (587322213), we get a palindrome (899545998).

The spelling of 312223785 in words is "three hundred twelve million, two hundred twenty-three thousand, seven hundred eighty-five".