3212443645 has 4 divisors (see below), whose sum is σ = 3854932380. Its totient is φ = 2569954912.

The previous prime is 3212443631. The next prime is 3212443669. The reversal of 3212443645 is 5463442123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5463442123 = 1129 ⋅4839187.

It can be written as a sum of positive squares in 2 ways, for example, as 1168409124 + 2044034521 = 34182^2 + 45211^2 .

It is a cyclic number.

It is not a de Polignac number, because 3212443645 - 2⁹ = 3212443133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3212443645.

It is a congruent 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, 321244360 + ... + 321244369.

It is an arithmetic number, because the mean of its divisors is an integer number (963733095).

Almost surely, 2^3212443645 is an apocalyptic number.

It is an amenable number.

3212443645 is a deficient number, since it is larger than the sum of its proper divisors (642488735).

3212443645 is an equidigital number, since it uses as much as digits as its factorization.

3212443645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642488734.

The product of its digits is 69120, while the sum is 34.

The square root of 3212443645 is about 56678.4230990948. The cubic root of 3212443645 is about 1475.5202447132.

Adding to 3212443645 its reverse (5463442123), we get a palindrome (8675885768).

The spelling of 3212443645 in words is "three billion, two hundred twelve million, four hundred forty-three thousand, six hundred forty-five".