1312203444 has 12 divisors (see below), whose sum is σ = 3061808064. Its totient is φ = 437401144.

The previous prime is 1312203419. The next prime is 1312203467. The reversal of 1312203444 is 4443022131.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1312203444² = 3443755756890922272, which contains 22 as substring.

It is a congruent number.

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, 54675132 + ... + 54675155.

It is an arithmetic number, because the mean of its divisors is an integer number (255150672).

Almost surely, 2^1312203444 is an apocalyptic number.

It is an amenable number.

1312203444 is an abundant number, since it is smaller than the sum of its proper divisors (1749604620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312203444 is a wasteful number, since it uses less digits than its factorization.

1312203444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109350294 (or 109350292 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1312203444 is about 36224.3487726143. The cubic root of 1312203444 is about 1094.7973170032.

Adding to 1312203444 its reverse (4443022131), we get a palindrome (5755225575).

The spelling of 1312203444 in words is "one billion, three hundred twelve million, two hundred three thousand, four hundred forty-four".