2173722953 has 12 divisors (see below), whose sum is σ = 2288316300. Its totient is φ = 2063329920.

The previous prime is 2173722919. The next prime is 2173722961. The reversal of 2173722953 is 3592273712.

It can be written as a sum of positive squares in 6 ways, for example, as 748131904 + 1425591049 = 27352^2 + 37757^2 .

It is not a de Polignac number, because 2173722953 - 2¹⁰ = 2173721929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2173722953.

It is not an unprimeable number, because it can be changed into a prime (2173722053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44723 + ... + 79671.

It is an arithmetic number, because the mean of its divisors is an integer number (190693025).

Almost surely, 2^2173722953 is an apocalyptic number.

It is an amenable number.

2173722953 is a deficient number, since it is larger than the sum of its proper divisors (114593347).

2173722953 is an equidigital number, since it uses as much as digits as its factorization.

2173722953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35068 (or 35027 counting only the distinct ones).

The product of its digits is 158760, while the sum is 41.

The square root of 2173722953 is about 46623.2018741742. The cubic root of 2173722953 is about 1295.3925561157.

The spelling of 2173722953 in words is "two billion, one hundred seventy-three million, seven hundred twenty-two thousand, nine hundred fifty-three".