2111155970 has 96 divisors (see below), whose sum is σ = 4981665024. Its totient is φ = 629354880.

The previous prime is 2111155957. The next prime is 2111156023. The reversal of 2111155970 is 795511112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189392 + ... + 200228.

It is an arithmetic number, because the mean of its divisors is an integer number (51892344).

Almost surely, 2^2111155970 is an apocalyptic number.

2111155970 is an abundant number, since it is smaller than the sum of its proper divisors (2870509054).

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

2111155970 is a wasteful number, since it uses less digits than its factorization.

2111155970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10896 (or 10885 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 32.

The square root of 2111155970 is about 45947.3173319183. The cubic root of 2111155970 is about 1282.8427966499.

The spelling of 2111155970 in words is "two billion, one hundred eleven million, one hundred fifty-five thousand, nine hundred seventy".