3221550644 has 24 divisors (see below), whose sum is σ = 6073479048. Its totient is φ = 1486356480.

The previous prime is 3221550623. The next prime is 3221550649. The reversal of 3221550644 is 4460551223.

It can be written as a sum of positive squares in 4 ways, for example, as 659976100 + 2561574544 = 25690^2 + 50612^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3221550644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221550649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170804 + ... + 188724.

It is an arithmetic number, because the mean of its divisors is an integer number (253061627).

Almost surely, 2^3221550644 is an apocalyptic number.

It is an amenable number.

3221550644 is a deficient number, since it is larger than the sum of its proper divisors (2851928404).

3221550644 is a wasteful number, since it uses less digits than its factorization.

3221550644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21395 (or 21393 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 3221550644 is about 56758.7054468299. The cubic root of 3221550644 is about 1476.9132531445.

The spelling of 3221550644 in words is "three billion, two hundred twenty-one million, five hundred fifty thousand, six hundred forty-four".