3539221000 has 96 divisors (see below), whose sum is σ = 9634037400. Its totient is φ = 1213430400.

The previous prime is 3539220961. The next prime is 3539221003. The reversal of 3539221000 is 1229353.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 470282596 + 3068938404 = 21686^2 + 55398^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (3539221003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12886 + ... + 85114.

Almost surely, 2^3539221000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3539221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4817018700).

3539221000 is an abundant number, since it is smaller than the sum of its proper divisors (6094816400).

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

3539221000 is a wasteful number, since it uses less digits than its factorization.

3539221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72264 (or 72243 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 3539221000 is about 59491.3523127521. The cubic root of 3539221000 is about 1523.9447685175.

The spelling of 3539221000 in words is "three billion, five hundred thirty-nine million, two hundred twenty-one thousand".