3243155 has 4 divisors (see below), whose sum is σ = 3891792. Its totient is φ = 2594520.

The previous prime is 3243143. The next prime is 3243169. The reversal of 3243155 is 5513423.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5513423 = 17 ⋅324319.

It is not a de Polignac number, because 3243155 - 2¹² = 3239059 is a prime.

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 3243155.

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, 324311 + ... + 324320.

It is an arithmetic number, because the mean of its divisors is an integer number (972948).

Almost surely, 2^3243155 is an apocalyptic number.

3243155 is a deficient number, since it is larger than the sum of its proper divisors (648637).

3243155 is an equidigital number, since it uses as much as digits as its factorization.

3243155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648636.

The product of its digits is 1800, while the sum is 23.

The square root of 3243155 is about 1800.8761756434. The cubic root of 3243155 is about 148.0207391195.

Adding to 3243155 its reverse (5513423), we get a palindrome (8756578).

The spelling of 3243155 in words is "three million, two hundred forty-three thousand, one hundred fifty-five".