2117257047 has 24 divisors (see below), whose sum is σ = 3088019376. Its totient is φ = 1397821056.

The previous prime is 2117256997. The next prime is 2117257063. The reversal of 2117257047 is 7407527112.

2117257047 is a `hidden beast` number, since 2 + 11 + 72 + 570 + 4 + 7 = 666.

It is not a de Polignac number, because 2117257047 - 2¹¹ = 2117254999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117257547) 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 23 ways as a sum of consecutive naturals, for example, 573973 + ... + 577649.

It is an arithmetic number, because the mean of its divisors is an integer number (128667474).

Almost surely, 2^2117257047 is an apocalyptic number.

2117257047 is a deficient number, since it is larger than the sum of its proper divisors (970762329).

2117257047 is a wasteful number, since it uses less digits than its factorization.

2117257047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287 (or 4284 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 36.

The square root of 2117257047 is about 46013.6615256817. The cubic root of 2117257047 is about 1284.0773801883.

The spelling of 2117257047 in words is "two billion, one hundred seventeen million, two hundred fifty-seven thousand, forty-seven".