2117253945 has 8 divisors (see below), whose sum is σ = 3387606336. Its totient is φ = 1129202096.

The previous prime is 2117253913. The next prime is 2117253947. The reversal of 2117253945 is 5493527112.

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 2117253945 - 2⁵ = 2117253913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2117253947) 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, 70575117 + ... + 70575146.

It is an arithmetic number, because the mean of its divisors is an integer number (423450792).

Almost surely, 2^2117253945 is an apocalyptic number.

It is an amenable number.

2117253945 is a deficient number, since it is larger than the sum of its proper divisors (1270352391).

2117253945 is a wasteful number, since it uses less digits than its factorization.

2117253945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141150271.

The product of its digits is 75600, while the sum is 39.

The square root of 2117253945 is about 46013.6278182888. The cubic root of 2117253945 is about 1284.0767530860.

The spelling of 2117253945 in words is "two billion, one hundred seventeen million, two hundred fifty-three thousand, nine hundred forty-five".