2133953991 has 40 divisors (see below), whose sum is σ = 3512881680. Its totient is φ = 1282635648.

The previous prime is 2133953989. The next prime is 2133954023. The reversal of 2133953991 is 1993593312.

It is a happy number.

2133953991 is a `hidden beast` number, since 21 + 3 + 3 + 9 + 539 + 91 = 666.

It is not a de Polignac number, because 2133953991 - 2¹ = 2133953989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133953791) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 21715 + ... + 68843.

It is an arithmetic number, because the mean of its divisors is an integer number (87822042).

Almost surely, 2^2133953991 is an apocalyptic number.

2133953991 is a deficient number, since it is larger than the sum of its proper divisors (1378927689).

2133953991 is a wasteful number, since it uses less digits than its factorization.

2133953991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47197 (or 47188 counting only the distinct ones).

The product of its digits is 196830, while the sum is 45.

The square root of 2133953991 is about 46194.7398628892. The cubic root of 2133953991 is about 1287.4440087003. Note that the first 3 decimals are identical.

The spelling of 2133953991 in words is "two billion, one hundred thirty-three million, nine hundred fifty-three thousand, nine hundred ninety-one".