2201421520 has 20 divisors (see below), whose sum is σ = 5118305220. Its totient is φ = 880568576.

The previous prime is 2201421503. The next prime is 2201421557. The reversal of 2201421520 is 251241022.

It can be written as a sum of positive squares in 2 ways, for example, as 1731225664 + 470195856 = 41608^2 + 21684^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×2201421520² = 9692513417438220800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13758805 + ... + 13758964.

It is an arithmetic number, because the mean of its divisors is an integer number (255915261).

Almost surely, 2^2201421520 is an apocalyptic number.

2201421520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2201421520 is an abundant number, since it is smaller than the sum of its proper divisors (2916883700).

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

2201421520 is a wasteful number, since it uses less digits than its factorization.

2201421520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27517782 (or 27517776 counting only the distinct ones).

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

The square root of 2201421520 is about 46919.3086053066. The cubic root of 2201421520 is about 1300.8715102900.

Adding to 2201421520 its reverse (251241022), we get a palindrome (2452662542).

It can be divided in two parts, 22014 and 21520, that added together give a palindrome (43534).

The spelling of 2201421520 in words is "two billion, two hundred one million, four hundred twenty-one thousand, five hundred twenty".