3215563645 has 64 divisors (see below), whose sum is σ = 4792919040. Its totient is φ = 2022451200.

The previous prime is 3215563639. The next prime is 3215563649. The reversal of 3215563645 is 5463655123.

It is not a de Polignac number, because 3215563645 - 2²¹ = 3213466493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3215563598 and 3215563607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3215563649) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4225065 + ... + 4225825.

It is an arithmetic number, because the mean of its divisors is an integer number (74889360).

Almost surely, 2^3215563645 is an apocalyptic number.

3215563645 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3215563645 is a deficient number, since it is larger than the sum of its proper divisors (1577355395).

3215563645 is a wasteful number, since it uses less digits than its factorization.

3215563645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006.

The product of its digits is 324000, while the sum is 40.

The square root of 3215563645 is about 56705.9401209432. The cubic root of 3215563645 is about 1475.9977766789.

The spelling of 3215563645 in words is "three billion, two hundred fifteen million, five hundred sixty-three thousand, six hundred forty-five".