1213063444 has 6 divisors (see below), whose sum is σ = 2122861034. Its totient is φ = 606531720.

The previous prime is 1213063427. The next prime is 1213063457. The reversal of 1213063444 is 4443603121.

It can be written as a sum of positive squares in only one way, i.e., 1211875344 + 1188100 = 34812^2 + 1090^2 .

It is a super-2 number, since 2×1213063444² = 2943045838338282272, 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 as a sum of consecutive naturals, namely, 151632927 + ... + 151632934.

Almost surely, 2^1213063444 is an apocalyptic number.

It is an amenable number.

1213063444 is a deficient number, since it is larger than the sum of its proper divisors (909797590).

1213063444 is a wasteful number, since it uses less digits than its factorization.

1213063444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303265865 (or 303265863 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 1213063444 is about 34829.0603375974. The cubic root of 1213063444 is about 1066.5007661690.

Adding to 1213063444 its reverse (4443603121), we get a palindrome (5656666565).

It can be divided in two parts, 121306 and 3444, that added together give a triangular number (124750 = T₄₉₉).

The spelling of 1213063444 in words is "one billion, two hundred thirteen million, sixty-three thousand, four hundred forty-four".