2101557312 has 84 divisors (see below), whose sum is σ = 6246882096. Its totient is φ = 700513920.

The previous prime is 2101557281. The next prime is 2101557313. The reversal of 2101557312 is 2137551012.

2101557312 is a `hidden beast` number, since 2 + 101 + 557 + 3 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2101557313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52014 + ... + 83117.

It is an arithmetic number, because the mean of its divisors is an integer number (74367644).

Almost surely, 2^2101557312 is an apocalyptic number.

It is an amenable number.

2101557312 is an abundant number, since it is smaller than the sum of its proper divisors (4145324784).

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

2101557312 is an equidigital number, since it uses as much as digits as its factorization.

2101557312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135158 (or 135136 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 2101557312 is about 45842.7454675219. The cubic root of 2101557312 is about 1280.8956361839.

The spelling of 2101557312 in words is "two billion, one hundred one million, five hundred fifty-seven thousand, three hundred twelve".