3213855 has 12 divisors (see below), whose sum is σ = 5570760. Its totient is φ = 1714032.

The previous prime is 3213853. The next prime is 3213877. The reversal of 3213855 is 5583123.

It is not a de Polignac number, because 3213855 - 2¹ = 3213853 is a prime.

It is a super-2 number, since 2×3213855² = 20657727922050, which contains 22 as substring.

3213855 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35665 + ... + 35754.

It is an arithmetic number, because the mean of its divisors is an integer number (464230).

Almost surely, 2^3213855 is an apocalyptic number.

3213855 is a deficient number, since it is larger than the sum of its proper divisors (2356905).

3213855 is a wasteful number, since it uses less digits than its factorization.

3213855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71430 (or 71427 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 3213855 is about 1792.7227895020. The cubic root of 3213855 is about 147.5736298099.

Adding to 3213855 its reverse (5583123), we get a palindrome (8796978).

The spelling of 3213855 in words is "three million, two hundred thirteen thousand, eight hundred fifty-five".