3213355860 has 540 divisors, whose sum is σ = 12121698204. Its totient is φ = 711659520.

The previous prime is 3213355819. The next prime is 3213355879. The reversal of 3213355860 is 685533123.

3213355860 is a `hidden beast` number, since 32 + 13 + 3 + 558 + 60 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 703947024 + 2509408836 = 26532^2 + 50094^2 .

It is a tau number, because it is divible by the number of its divisors (540).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 33127332 + ... + 33127428.

Almost surely, 2^3213355860 is an apocalyptic number.

3213355860 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3213355860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6060849102).

3213355860 is an abundant number, since it is smaller than the sum of its proper divisors (8908342344).

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

3213355860 is a wasteful number, since it uses less digits than its factorization.

3213355860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 3213355860 is about 56686.4698142334. The cubic root of 3213355860 is about 1475.6598958599.

Adding to 3213355860 its reverse (685533123), we get a palindrome (3898888983).

The spelling of 3213355860 in words is "three billion, two hundred thirteen million, three hundred fifty-five thousand, eight hundred sixty".