2065517220 has 48 divisors (see below), whose sum is σ = 6228331200. Its totient is φ = 508434816.

The previous prime is 2065517171. The next prime is 2065517239. The reversal of 2065517220 is 227155602.

It is a super-2 number, since 2×2065517220² = 8532722772233056800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1323270 + ... + 1324829.

It is an arithmetic number, because the mean of its divisors is an integer number (129756900).

Almost surely, 2^2065517220 is an apocalyptic number.

2065517220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2065517220 is an abundant number, since it is smaller than the sum of its proper divisors (4162813980).

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

2065517220 is a wasteful number, since it uses less digits than its factorization.

2065517220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648124 (or 2648122 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 2065517220 is about 45447.9616704644. The cubic root of 2065517220 is about 1273.5312514249.

The spelling of 2065517220 in words is "two billion, sixty-five million, five hundred seventeen thousand, two hundred twenty".