2172358943 has 4 divisors (see below), whose sum is σ = 2172616320. Its totient is φ = 2172101568.

The previous prime is 2172358931. The next prime is 2172358961. The reversal of 2172358943 is 3498532712.

It is a happy number.

2172358943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2172358943 - 2¹⁶ = 2172293407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2172358894 and 2172358903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172358913) 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, 115583 + ... + 133056.

It is an arithmetic number, because the mean of its divisors is an integer number (543154080).

Almost surely, 2^2172358943 is an apocalyptic number.

2172358943 is a deficient number, since it is larger than the sum of its proper divisors (257377).

2172358943 is an equidigital number, since it uses as much as digits as its factorization.

2172358943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257376.

The product of its digits is 362880, while the sum is 44.

The square root of 2172358943 is about 46608.5715614628. The cubic root of 2172358943 is about 1295.1215467078.

The spelling of 2172358943 in words is "two billion, one hundred seventy-two million, three hundred fifty-eight thousand, nine hundred forty-three".