2104221520 has 40 divisors (see below), whose sum is σ = 4896978984. Its totient is φ = 840886272.

The previous prime is 2104221491. The next prime is 2104221547. The reversal of 2104221520 is 251224012.

It can be written as a sum of positive squares in 4 ways, for example, as 65157184 + 2039064336 = 8072^2 + 45156^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×2104221520² = 8855496410462220800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75772 + ... + 99748.

Almost surely, 2^2104221520 is an apocalyptic number.

2104221520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2104221520 is an abundant number, since it is smaller than the sum of its proper divisors (2792757464).

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

2104221520 is a wasteful number, since it uses less digits than its factorization.

2104221520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25087 (or 25081 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2104221520 is about 45871.7943839131. The cubic root of 2104221520 is about 1281.4366843743.

Adding to 2104221520 its reverse (251224012), we get a palindrome (2355445532).

The spelling of 2104221520 in words is "two billion, one hundred four million, two hundred twenty-one thousand, five hundred twenty".