3213606545 has 4 divisors (see below), whose sum is σ = 3856327860. Its totient is φ = 2570885232.

The previous prime is 3213606541. The next prime is 3213606569. The reversal of 3213606545 is 5456063123.

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

It can be written as a sum of positive squares in 2 ways, for example, as 398561296 + 2815045249 = 19964^2 + 53057^2 .

It is a cyclic number.

It is not a de Polignac number, because 3213606545 - 2² = 3213606541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3213606541) 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, 321360650 + ... + 321360659.

It is an arithmetic number, because the mean of its divisors is an integer number (964081965).

Almost surely, 2^3213606545 is an apocalyptic number.

It is an amenable number.

3213606545 is a deficient number, since it is larger than the sum of its proper divisors (642721315).

3213606545 is an equidigital number, since it uses as much as digits as its factorization.

3213606545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642721314.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 3213606545 is about 56688.6809248548. The cubic root of 3213606545 is about 1475.6982686388.

Adding to 3213606545 its reverse (5456063123), we get a palindrome (8669669668).

The spelling of 3213606545 in words is "three billion, two hundred thirteen million, six hundred six thousand, five hundred forty-five".