2011505140 has 24 divisors (see below), whose sum is σ = 4254556320. Its totient is φ = 798812448.

The previous prime is 2011505123. The next prime is 2011505149. The reversal of 2011505140 is 415051102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011505149) 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, 359002 + ... + 364561.

It is an arithmetic number, because the mean of its divisors is an integer number (177273180).

Almost surely, 2^2011505140 is an apocalyptic number.

2011505140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011505140 is an abundant number, since it is smaller than the sum of its proper divisors (2243051180).

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

2011505140 is a wasteful number, since it uses less digits than its factorization.

2011505140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723711 (or 723709 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 2011505140 is about 44849.8064655802. The cubic root of 2011505140 is about 1262.3323600565.

Adding to 2011505140 its reverse (415051102), we get a palindrome (2426556242).

The spelling of 2011505140 in words is "two billion, eleven million, five hundred five thousand, one hundred forty".