2117169851 has 8 divisors (see below), whose sum is σ = 2254097664. Its totient is φ = 1981618560.

The previous prime is 2117169833. The next prime is 2117169877. The reversal of 2117169851 is 1589617112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2117169851 - 2⁶ = 2117169787 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2117169799 and 2117169808.

It is not an unprimeable number, because it can be changed into a prime (2117162851) 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 7 ways as a sum of consecutive naturals, for example, 340955 + ... + 347108.

It is an arithmetic number, because the mean of its divisors is an integer number (281762208).

Almost surely, 2^2117169851 is an apocalyptic number.

2117169851 is a deficient number, since it is larger than the sum of its proper divisors (136927813).

2117169851 is a wasteful number, since it uses less digits than its factorization.

2117169851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688261.

The product of its digits is 30240, while the sum is 41.

The square root of 2117169851 is about 46012.7140147155. The cubic root of 2117169851 is about 1284.0597523572.

The spelling of 2117169851 in words is "two billion, one hundred seventeen million, one hundred sixty-nine thousand, eight hundred fifty-one".