2172355 has 4 divisors (see below), whose sum is σ = 2606832. Its totient is φ = 1737880.

The previous prime is 2172347. The next prime is 2172367. The reversal of 2172355 is 5532712.

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

It is not a de Polignac number, because 2172355 - 2³ = 2172347 is a prime.

It is a d-powerful number, because it can be written as 2¹² + 1 + 7⁶ + 2¹⁶ + 3¹³ + 5³ + 5⁸ .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217231 + ... + 217240.

It is an arithmetic number, because the mean of its divisors is an integer number (651708).

2^2172355 is an apocalyptic number.

2172355 is a deficient number, since it is larger than the sum of its proper divisors (434477).

2172355 is an equidigital number, since it uses as much as digits as its factorization.

2172355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434476.

The product of its digits is 2100, while the sum is 25.

The square root of 2172355 is about 1473.8911085966. The cubic root of 2172355 is about 129.5120763125.

The spelling of 2172355 in words is "two million, one hundred seventy-two thousand, three hundred fifty-five".