3213561 has 32 divisors (see below), whose sum is σ = 5056128. Its totient is φ = 1797120.

The previous prime is 3213559. The next prime is 3213589. The reversal of 3213561 is 1653123.

It is not a de Polignac number, because 3213561 - 2¹ = 3213559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3213961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24466 + ... + 24596.

It is an arithmetic number, because the mean of its divisors is an integer number (158004).

Almost surely, 2^3213561 is an apocalyptic number.

It is an amenable number.

3213561 is a deficient number, since it is larger than the sum of its proper divisors (1842567).

3213561 is a wasteful number, since it uses less digits than its factorization.

3213561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201.

The product of its digits is 540, while the sum is 21.

The square root of 3213561 is about 1792.6407894500. The cubic root of 3213561 is about 147.5691297137.

Adding to 3213561 its reverse (1653123), we get a palindrome (4866684).

The spelling of 3213561 in words is "three million, two hundred thirteen thousand, five hundred sixty-one".