312221444 has 12 divisors (see below), whose sum is σ = 547766604. Its totient is φ = 155716704.

The previous prime is 312221431. The next prime is 312221501. The reversal of 312221444 is 444122213.

It can be written as a sum of positive squares in 2 ways, for example, as 88360000 + 223861444 = 9400^2 + 14962^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96719 + ... + 99894.

It is an arithmetic number, because the mean of its divisors is an integer number (45647217).

Almost surely, 2^312221444 is an apocalyptic number.

It is an amenable number.

312221444 is a deficient number, since it is larger than the sum of its proper divisors (235545160).

312221444 is a wasteful number, since it uses less digits than its factorization.

312221444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197014 (or 197012 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 312221444 is about 17669.7890196799. The cubic root of 312221444 is about 678.4027129254.

Adding to 312221444 its reverse (444122213), we get a palindrome (756343657).

The spelling of 312221444 in words is "three hundred twelve million, two hundred twenty-one thousand, four hundred forty-four".