1312223204 has 48 divisors (see below), whose sum is σ = 2499623280. Its totient is φ = 601251840.

The previous prime is 1312223203. The next prime is 1312223243. The reversal of 1312223204 is 4023222131.

It can be written as a sum of positive squares in 8 ways, for example, as 27144100 + 1285079104 = 5210^2 + 35848^2 .

It is not an unprimeable number, because it can be changed into a prime (1312223203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172244 + ... + 179700.

It is an arithmetic number, because the mean of its divisors is an integer number (52075485).

Almost surely, 2^1312223204 is an apocalyptic number.

It is an amenable number.

1312223204 is a deficient number, since it is larger than the sum of its proper divisors (1187400076).

1312223204 is a wasteful number, since it uses less digits than its factorization.

1312223204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7568 (or 7566 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1312223204 is about 36224.6215163113. The cubic root of 1312223204 is about 1094.8028123620.

Adding to 1312223204 its reverse (4023222131), we get a palindrome (5335445335).

The spelling of 1312223204 in words is "one billion, three hundred twelve million, two hundred twenty-three thousand, two hundred four".