1213043444 has 12 divisors (see below), whose sum is σ = 2123158464. Its totient is φ = 606426744.

The previous prime is 1213043443. The next prime is 1213043453. The reversal of 1213043444 is 4443403121.

It is a super-2 number, since 2×1213043444² = 2942948794062762272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213043443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10469 + ... + 50355.

It is an arithmetic number, because the mean of its divisors is an integer number (176929872).

Almost surely, 2^1213043444 is an apocalyptic number.

It is an amenable number.

1213043444 is a deficient number, since it is larger than the sum of its proper divisors (910115020).

1213043444 is a wasteful number, since it uses less digits than its factorization.

1213043444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47494 (or 47492 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 1213043444 is about 34828.7732198537. The cubic root of 1213043444 is about 1066.4949049388.

Adding to 1213043444 its reverse (4443403121), we get a palindrome (5656446565).

The spelling of 1213043444 in words is "one billion, two hundred thirteen million, forty-three thousand, four hundred forty-four".