312220144 has 10 divisors (see below), whose sum is σ = 604926560. Its totient is φ = 156110064.

The previous prime is 312220121. The next prime is 312220159. The reversal of 312220144 is 441022213.

It is a congruent number.

It is an unprimeable number.

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, 9756864 + ... + 9756895.

It is an arithmetic number, because the mean of its divisors is an integer number (60492656).

Almost surely, 2^312220144 is an apocalyptic number.

It is an amenable number.

312220144 is a deficient number, since it is larger than the sum of its proper divisors (292706416).

312220144 is a wasteful number, since it uses less digits than its factorization.

312220144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19513767 (or 19513761 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 312220144 is about 17669.7522336902. The cubic root of 312220144 is about 678.4017713664.

Adding to 312220144 its reverse (441022213), we get a palindrome (753242357).

The spelling of 312220144 in words is "three hundred twelve million, two hundred twenty thousand, one hundred forty-four".