33221143444 has 6 divisors (see below), whose sum is σ = 58137001034. Its totient is φ = 16610571720.

The previous prime is 33221143429. The next prime is 33221143447. The reversal of 33221143444 is 44434112233.

It can be written as a sum of positive squares in only one way, i.e., 17082490000 + 16138653444 = 130700^2 + 127038^2 .

It is a super-2 number, since 2×33221143444² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221143447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4152642927 + ... + 4152642934.

Almost surely, 2^33221143444 is an apocalyptic number.

It is an amenable number.

33221143444 is a deficient number, since it is larger than the sum of its proper divisors (24915857590).

33221143444 is a wasteful number, since it uses less digits than its factorization.

33221143444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8305285865 (or 8305285863 counting only the distinct ones).

The product of its digits is 27648, while the sum is 31.

Adding to 33221143444 its reverse (44434112233), we get a palindrome (77655255677).

The spelling of 33221143444 in words is "thirty-three billion, two hundred twenty-one million, one hundred forty-three thousand, four hundred forty-four".