3521722320 has 80 divisors (see below), whose sum is σ = 12130384320. Its totient is φ = 939125376.

The previous prime is 3521722307. The next prime is 3521722339. The reversal of 3521722320 is 232271253.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 813054 + ... + 817373.

It is an arithmetic number, because the mean of its divisors is an integer number (151629804).

Almost surely, 2^3521722320 is an apocalyptic number.

3521722320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3521722320 is an abundant number, since it is smaller than the sum of its proper divisors (8608662000).

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

3521722320 is a wasteful number, since it uses less digits than its factorization.

3521722320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630449 (or 1630437 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 3521722320 is about 59344.1009705261. The cubic root of 3521722320 is about 1521.4290461642.

Adding to 3521722320 its reverse (232271253), we get a palindrome (3753993573).

The spelling of 3521722320 in words is "three billion, five hundred twenty-one million, seven hundred twenty-two thousand, three hundred twenty".