2111511340 has 48 divisors (see below), whose sum is σ = 4514711040. Its totient is φ = 829313280.

The previous prime is 2111511329. The next prime is 2111511359. The reversal of 2111511340 is 431151112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 941941 + ... + 944179.

It is an arithmetic number, because the mean of its divisors is an integer number (94056480).

Almost surely, 2^2111511340 is an apocalyptic number.

2111511340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111511340 is an abundant number, since it is smaller than the sum of its proper divisors (2403199700).

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

2111511340 is a wasteful number, since it uses less digits than its factorization.

2111511340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3082 (or 3080 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 2111511340 is about 45951.1843155321. The cubic root of 2111511340 is about 1282.9147727417.

Adding to 2111511340 its reverse (431151112), we get a palindrome (2542662452).

The spelling of 2111511340 in words is "two billion, one hundred eleven million, five hundred eleven thousand, three hundred forty".