2133165720 has 128 divisors (see below), whose sum is σ = 7698700800. Its totient is φ = 461915136.

The previous prime is 2133165719. The next prime is 2133165757. The reversal of 2133165720 is 275613312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50869 + ... + 82788.

It is an arithmetic number, because the mean of its divisors is an integer number (60146100).

Almost surely, 2^2133165720 is an apocalyptic number.

2133165720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2133165720 is an abundant number, since it is smaller than the sum of its proper divisors (5565535080).

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

2133165720 is a wasteful number, since it uses less digits than its factorization.

2133165720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133697 (or 133693 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 2133165720 is about 46186.2070319701. The cubic root of 2133165720 is about 1287.2854642382.

The spelling of 2133165720 in words is "two billion, one hundred thirty-three million, one hundred sixty-five thousand, seven hundred twenty".