3211530630 has 128 divisors (see below), whose sum is σ = 9625927680. Its totient is φ = 666195840.

The previous prime is 3211530629. The next prime is 3211530649. The reversal of 3211530630 is 360351123.

It is a happy number.

3211530630 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3211530630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2510331 + ... + 2511609.

It is an arithmetic number, because the mean of its divisors is an integer number (75202560).

Almost surely, 2^3211530630 is an apocalyptic number.

3211530630 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3211530630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4812963840).

3211530630 is an abundant number, since it is smaller than the sum of its proper divisors (6414397050).

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

3211530630 is a wasteful number, since it uses less digits than its factorization.

3211530630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 3211530630 is about 56670.3681830284. The cubic root of 3211530630 is about 1475.3804446199.

Adding to 3211530630 its reverse (360351123), we get a palindrome (3571881753).

The spelling of 3211530630 in words is "three billion, two hundred eleven million, five hundred thirty thousand, six hundred thirty".