2160205521 has 16 divisors (see below), whose sum is σ = 3132129024. Its totient is φ = 1318788864.

The previous prime is 2160205511. The next prime is 2160205529. The reversal of 2160205521 is 1255020612.

It is a happy number.

It is not a de Polignac number, because 2160205521 - 2⁹ = 2160205009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2160205491 and 2160205500.

It is not an unprimeable number, because it can be changed into a prime (2160205529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 570505 + ... + 574278.

It is an arithmetic number, because the mean of its divisors is an integer number (195758064).

Almost surely, 2^2160205521 is an apocalyptic number.

It is an amenable number.

2160205521 is a deficient number, since it is larger than the sum of its proper divisors (971923503).

2160205521 is a wasteful number, since it uses less digits than its factorization.

2160205521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144840.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2160205521 is about 46478.0111558143. The cubic root of 2160205521 is about 1292.7018110126.

The spelling of 2160205521 in words is "two billion, one hundred sixty million, two hundred five thousand, five hundred twenty-one".