2172173555707 has 4 divisors (see below), whose sum is σ = 2266615884240. Its totient is φ = 2077731227176.

The previous prime is 2172173555693. The next prime is 2172173555771. The reversal of 2172173555707 is 7075553712712.

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

It is not a de Polignac number, because 2172173555707 - 2³¹ = 2170026072059 is a prime.

It is a super-2 number, since 2×2172173555707² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172173559707) 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, 47221164232 + ... + 47221164277.

It is an arithmetic number, because the mean of its divisors is an integer number (566653971060).

Almost surely, 2^{2172173555707} is an apocalyptic number.

2172173555707 is a deficient number, since it is larger than the sum of its proper divisors (94442328533).

2172173555707 is an equidigital number, since it uses as much as digits as its factorization.

2172173555707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94442328532.

The product of its (nonzero) digits is 3601500, while the sum is 52.

The spelling of 2172173555707 in words is "two trillion, one hundred seventy-two billion, one hundred seventy-three million, five hundred fifty-five thousand, seven hundred seven".