3550221738 has 96 divisors (see below), whose sum is σ = 9134536320. Its totient is φ = 1012357440.

The previous prime is 3550221713. The next prime is 3550221757. The reversal of 3550221738 is 8371220553.

It is a happy number.

3550221738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3200728 + ... + 3201836.

It is an arithmetic number, because the mean of its divisors is an integer number (95151420).

Almost surely, 2^3550221738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3550221738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4567268160).

3550221738 is an abundant number, since it is smaller than the sum of its proper divisors (5584314582).

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

3550221738 is a wasteful number, since it uses less digits than its factorization.

3550221738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074 (or 2062 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 3550221738 is about 59583.7371939693. The cubic root of 3550221738 is about 1525.5220626633.

The spelling of 3550221738 in words is "three billion, five hundred fifty million, two hundred twenty-one thousand, seven hundred thirty-eight".