2172331 has 4 divisors (see below), whose sum is σ = 2482672. Its totient is φ = 1861992.

The previous prime is 2172323. The next prime is 2172337. The reversal of 2172331 is 1332712.

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 2172331 - 2³ = 2172323 is a prime.

It is a super-2 number, since 2×2172331² = 9438043947122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2172299 and 2172308.

It is not an unprimeable number, because it can be changed into a prime (2172337) 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, 155160 + ... + 155173.

It is an arithmetic number, because the mean of its divisors is an integer number (620668).

2^2172331 is an apocalyptic number.

2172331 is a deficient number, since it is larger than the sum of its proper divisors (310341).

2172331 is an equidigital number, since it uses as much as digits as its factorization.

2172331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310340.

The product of its digits is 252, while the sum is 19.

The square root of 2172331 is about 1473.8829668600. The cubic root of 2172331 is about 129.5115993645.

The spelling of 2172331 in words is "two million, one hundred seventy-two thousand, three hundred thirty-one".