2051111320 has 32 divisors (see below), whose sum is σ = 4618152720. Its totient is φ = 819884160.

The previous prime is 2051111299. The next prime is 2051111327. The reversal of 2051111320 is 231111502.

It is a junction number, because it is equal to n+sod(n) for n = 2051111294 and 2051111303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051111327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44494 + ... + 77986.

Almost surely, 2^2051111320 is an apocalyptic number.

2051111320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2051111320 is an abundant number, since it is smaller than the sum of its proper divisors (2567041400).

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

2051111320 is a wasteful number, since it uses less digits than its factorization.

2051111320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35035 (or 35031 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 2051111320 is about 45289.1965042437. The cubic root of 2051111320 is about 1270.5636037732.

Adding to 2051111320 its reverse (231111502), we get a palindrome (2282222822).

The spelling of 2051111320 in words is "two billion, fifty-one million, one hundred eleven thousand, three hundred twenty".