2133561907 has 4 divisors (see below), whose sum is σ = 2141154936. Its totient is φ = 2125968880.

The previous prime is 2133561901. The next prime is 2133561943. The reversal of 2133561907 is 7091653312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2133561907 is a prime.

It is a super-2 number, since 2×2133561907² = 9104172822002953298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2133561901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3796093 + ... + 3796654.

It is an arithmetic number, because the mean of its divisors is an integer number (535288734).

Almost surely, 2^2133561907 is an apocalyptic number.

2133561907 is a deficient number, since it is larger than the sum of its proper divisors (7593029).

2133561907 is an equidigital number, since it uses as much as digits as its factorization.

2133561907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7593028.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 2133561907 is about 46190.4958514195. The cubic root of 2133561907 is about 1287.3651539674.

The spelling of 2133561907 in words is "two billion, one hundred thirty-three million, five hundred sixty-one thousand, nine hundred seven".