2173117572 has 30 divisors (see below), whose sum is σ = 5680959438. Its totient is φ = 724372416.

The previous prime is 2173117549. The next prime is 2173117591. The reversal of 2173117572 is 2757113712.

It is a happy number.

2173117572 is a `hidden beast` number, since 2 + 1 + 73 + 1 + 17 + 572 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2170069056 + 3048516 = 46584^2 + 1746^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3353253 + ... + 3353900.

Almost surely, 2^2173117572 is an apocalyptic number.

It is an amenable number.

2173117572 is an abundant number, since it is smaller than the sum of its proper divisors (3507841866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2173117572 is a wasteful number, since it uses less digits than its factorization.

2173117572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707169 (or 6707158 counting only the distinct ones).

The product of its digits is 20580, while the sum is 36.

The square root of 2173117572 is about 46616.7091502607. The cubic root of 2173117572 is about 1295.2722895087.

The spelling of 2173117572 in words is "two billion, one hundred seventy-three million, one hundred seventeen thousand, five hundred seventy-two".