3315621 has 4 divisors (see below), whose sum is σ = 4420832. Its totient is φ = 2210412.

The previous prime is 3315619. The next prime is 3315643. The reversal of 3315621 is 1265133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1265133 = 3 ⋅421711.

It is not a de Polignac number, because 3315621 - 2¹ = 3315619 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3315661) 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, 552601 + ... + 552606.

It is an arithmetic number, because the mean of its divisors is an integer number (1105208).

Almost surely, 2^3315621 is an apocalyptic number.

It is an amenable number.

3315621 is a deficient number, since it is larger than the sum of its proper divisors (1105211).

3315621 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 3315621 = (6213153)₉.

3315621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105210.

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

The square root of 3315621 is about 1820.8846750961. The cubic root of 3315621 is about 149.1151010691.

The spelling of 3315621 in words is "three million, three hundred fifteen thousand, six hundred twenty-one".