3453221520 has 240 divisors, whose sum is σ = 13313469312. Its totient is φ = 785756160.

The previous prime is 3453221503. The next prime is 3453221531. The reversal of 3453221520 is 251223543.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×3453221520² = 23849477732382220800, which contains 22 as substring.

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, 1213219 + ... + 1216061.

Almost surely, 2^3453221520 is an apocalyptic number.

3453221520 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 3453221520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6656734656).

3453221520 is an abundant number, since it is smaller than the sum of its proper divisors (9860247792).

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

3453221520 is a wasteful number, since it uses less digits than its factorization.

3453221520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110 (or 3101 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 3453221520 is about 58764.1176229168. The cubic root of 3453221520 is about 1511.4999816345.

The spelling of 3453221520 in words is "three billion, four hundred fifty-three million, two hundred twenty-one thousand, five hundred twenty".